{"title":"Cylinder Heads","description":"\u003cp\u003eRemanufactured and new heavy-duty diesel cylinder heads, including JAK’s Diesel performance heads, for Caterpillar, Cummins, Detroit, PACCAR, and more. Pressure-tested and available fully loaded, with core exchange on qualifying units. Not sure which head fits your ESN? Call a specialist before you order.\u003c\/p\u003e","products":[{"product_id":"2239250-caterpillar-c15-acert-cylinder-head-stage-3-inconel-valves","title":"2239250 Caterpillar C15 \/ C15 Acert Cylinder Head Stage 3 Inconel Intake \u0026 Exhaust Valves","description":"\u003cp\u003e\u003cspan\u003e Advantages of JAK's High-Performance C15 Universal Cylinder Head Get ahead of the pack with JAK's brand-new, fully equipped C15 Universal Cylinder Head, designed to work seamlessly with both Acert and non-Acert engines. This versatile head is compatible with applications ranging from 3406E to C15 and Acert models. JAK's cylinder heads surpass OEM standards, featuring a casting material with 5% additional nickel content for enhanced durability and to prevent cracking between the valves. Additionally, coolant passages are expanded by 30%, and internal ribs are reinforced to minimize thermal stress, ensuring superior performance. What Makes JAK's Stage 3 Cylinder Head Stand Out? JAK's Stage 3 cylinder head is a significant upgrade over the Stage 2 model, equipped with premium Inconel valves for both intake and exhaust. These high-performance valves are engineered to withstand extreme temperatures and pressures, making them ideal for high-demand applications. Whether you're increasing horsepower with a marine camshaft, marine injectors, or a high-performance turbo, JAK's Stage 3 head ensures your cylinder head can keep up with the added stress. Unlike standard valves, which can fracture under high-horsepower conditions, the Inconel valves in JAK's Stage 3 head provide exceptional resistance to heat, corrosion, pitting, and cracking. This makes it the ideal choice for those looking to maximize engine performance while ensuring long-term reliability. Note: Any references to OEM names, product IDs, descriptions, or model numbers are used solely for identification purposes and do not imply that this is an OEM part.   Inconel valves, as featured in JAK's Stage 3 C15 Universal Cylinder Head, offer significant advantages, especially in high-performance diesel engines like the 3406E, C15, and C15 Acert. Below is an explanation of their key benefits, tailored to the context of the cylinder head description provided: Superior Heat Resistance : Inconel is a nickel-chromium-based superalloy known for its exceptional ability to withstand extreme temperatures. In high-performance engines, where exhaust gas temperatures can soar due to increased horsepower (e.g., from marine camshafts, injectors, or large turbochargers), Inconel valves maintain their structural integrity. Unlike standard valves, which may deform or weaken under intense heat, Inconel valves resist thermal fatigue, ensuring reliable performance in demanding conditions. Enhanced Durability Under Pressure : Inconel valves are designed to endure high-pressure environments, such as those created by boosted horsepower or aggressive engine modifications. Their robust material properties prevent valve failure, such as cracking or fracturing, which is a common issue with standard valves when engines are pushed to higher performance levels. This makes them ideal for applications requiring sustained high output. Resistance to Corrosion and Pitting : The nickel and chromium content in Inconel provides excellent resistance to corrosion and pitting, which can occur due to exposure to harsh combustion byproducts or extreme operating conditions. This ensures the valves maintain their surface integrity over time, reducing wear and extending the lifespan of the cylinder head. Prevention of Fractures : As noted in JAK's Stage 3 cylinder head description, standard valves are prone to fracturing under high-horsepower conditions. Inconel’s superior strength and toughness prevent these fractures, offering greater reliability for engines modified for performance, such as those with marine camshafts or high-output turbochargers. Improved Longevity and Reliability : The combination of heat resistance, pressure tolerance, and corrosion resistance makes Inconel valves a long-lasting solution. This reduces the need for frequent valve replacements or repairs, providing a cost-effective solution over time for performance enthusiasts seeking to \"get ahead of the pack\" with JAK's products. Optimized for High-Performance Applications : Inconel valves are specifically chosen for JAK's Stage 3 cylinder head to support engine upgrades like marine injectors or big turbos. Their ability to handle increased thermal and mechanical stress ensures the cylinder head can keep up with the rest of the engine, preventing performance bottlenecks and maintaining consistent power output. In summary, Inconel valves in JAK's Stage 3 cylinder head provide unmatched durability, heat resistance, and reliability, making them the ideal choice for diesel engine enthusiasts looking to maximize performance while avoiding common issues like valve fractures, corrosion, or heat-related failures. These benefits ensure the engine remains robust and efficient, even under the most extreme operating conditions.\u003c\/span\u003e\u003c\/p\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45761644527801,"sku":"JAKS-J2239250IV","price":4108.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/J2239250IV-2.png?v=1766793203"},{"product_id":"2239250-caterpillar-c15-acert-cylinder-head-stage-1-regular-valves","title":"2239250 Caterpillar C15 \/ C15 Acert Cylinder Head Stage 1 Regular Valves","description":"\u003cp\u003eBacked by a standard 1-year warranty, these C15 intake and exhaust valves represent a cost-effective upgrade path for diesel enthusiasts. Built with enhanced material composition—featuring 5% additional nickel for superior crack resistance—these components withstand demanding conditions. The engineering includes 30% expanded coolant passages and reinforced internal ribs to reduce thermal stress. As the entry-level Stage 1 option, these standard valves deliver dependable functionality without the premium pricing of advanced Stage 2 or Stage 3 alternatives, making them ideal for operators seeking reliable performance improvements on a practical budget.\u003c\/p\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45761671069881,"sku":"JAKS-J2239250","price":3055.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/J2239250-1_867e54e1-bf79-4293-abe3-107265d46d3d.png?v=1766793899"},{"product_id":"5658294-cummins-x15-single-cam-cylinder-head-stage-2-inconel-intake","title":"5658294 Cummins X15 Single Cam Cylinder Head Stage 2 Inconel Intake Valves","description":"\u003cp\u003e\u003cspan\u003eJAK's Stage 2 X15   Single Cam  Cylinder Head JAK's Stage 2 X15 Cylinder Head offers a high-performance, cost-effective upgrade for your X15 engine, combining durability with advanced engineering. Designed for seamless compatibility with X15 engines, this head features an OE-equivalent casting material and is equipped with premium Inconel intake valves for superior resistance to heat, pressure, corrosion, and fracturing. The exhaust side uses standard valves, setting it apart from the Stage 1, which has standard valves on both sides, and the Stage 3, which includes further enhancements. The Stage 2 delivers enhanced performance and reliability, making it an excellent choice for demanding applications while maintaining affordability. 5658294 Note: Any references to OEM names, product IDs, descriptions, or model numbers are used solely for identification purposes and do not imply that this is an OEM part.\u003c\/span\u003e\u003c\/p\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45761754038457,"sku":"JAKS-J4298234","price":3433.33,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/J4298234.png?v=1766797624"},{"product_id":"23525566-detroit-series-60-12-7l-cylinder-head-regular-valves","title":"23525566 Detroit Series 60 12.7L Cylinder Head Regular Intake \u0026 Exhaust Valves","description":"\u003cp\u003e\u003cspan\u003eAdvantages of JAK's Performance Detroit Diesel S60 12.7L Cylinder Head Boost your engine with JAK's premium S60 12.7L cylinder head, engineered to surpass OEM standards. This high-performance head features a casting material with 5% additional nickel content to prevent cracking between the valves. With 30% larger coolant passages and reinforced internal ribs, it minimizes thermal stress for enhanced durability. Say goodbye to the costly downtime caused by cracked cylinder heads—unlike standard remanufactured OEM heads, JAK's performance head delivers reliable, worry-free operation for long hauls and demanding applications. What Makes This Performance Head Stand Out? This enhanced cylinder head elevates standard designs with superior casting upgrades, featuring standard valves on both the intake and exhaust sides. While optimized for reliability and performance in standard applications, it provides a robust foundation for those seeking a cost-effective upgrade without compromising quality. Designed to resist corrosion, pitting, and cracking, this head is perfect for drivers and operators looking to enhance engine longevity and maintain consistent performance. Note: Any references to OEM names, product IDs, descriptions, or model numbers are used solely for identification purposes and do not imply that this is an OEM part.\u003c\/span\u003e\u003c\/p\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45761816035513,"sku":"JAKS-J23525566","price":2900.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/j23525566.png?v=1766799386"},{"product_id":"4730101420-detroit-dd15-cylinder-head-inconel-valves-cgi","title":"4730101420 Detroit DD15 Cylinder Head Inconel Intake \u0026 Exhaust Valves CGI","description":"\u003cp\u003e\u003cspan\u003eAdvantages of JAK's Performance Detroit Diesel DD15 Cylinder Head with CGI Elevate your engine's performance with JAK's premium DD15 cylinder head, crafted with cutting-edge Compacted Graphite Iron (CGI) casting to exceed OEM standards. The CGI material, enhanced with 5% additional nickel content, prevents cracking between the valves while offering 75% greater tensile strength , 45% higher stiffness , and double the fatigue resistance compared to traditional gray iron. With 30% larger coolant passages and reinforced internal ribs, this head minimizes thermal stress for superior durability and improved thermal conductivity, supporting higher cylinder pressures for better fuel efficiency and power output. If you've faced costly downtime from a cracked cylinder head, avoid unreliable remanufactured OEM heads. Choose JAK's enhanced performance head for worry-free reliability on long hauls. This head is compatible with ESN prefixes: 472903S, 472904S, 472905S, 472906S, 472907S, 472908S. What Defines This Enhanced Performance Head? This performance cylinder head surpasses standard designs with advanced CGI casting and Inconel exhaust valves . These high-performance valves withstand extreme temperatures and pressures, eliminating the common issue of valve fracturing in high-horsepower applications. With exceptional resistance to heat, corrosion, pitting, and cracking, this head ensures your engine delivers maximum power and long-term reliability. Perfect for operators seeking top-tier performance and durability in demanding conditions, JAK's DD15 cylinder head with CGI is the ultimate upgrade. Note: Any references to OEM names, product IDs, descriptions, or model numbers are used solely for identification purposes and do not imply that this is an OEM part.\u003c\/span\u003e\u003c\/p\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45761818788025,"sku":"JAKS-J4730101420","price":3841.38,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/J23538858_2f03079d-75f5-497e-943d-4bb7fd540e18.png?v=1766805236"},{"product_id":"5658294-cummins-x15-single-cam-cylinder-head-stage-3-inconel-valves","title":"5658294 Cummins X15 Single Cam Cylinder Head Stage 3 Inconel Intake \u0026 Exhaust Valves","description":"\u003cp\u003e\u003cspan\u003eJAK's Stage 3 X15 Single Cam Cylinder Head with Full Inconel Valves JAK's Stage 3 X15 Cylinder Head represents the pinnacle of performance and durability for X15 engines, offering a robust upgrade for high-demand applications. Engineered for seamless compatibility with X15 engines, this head features an OE-equivalent casting material enhanced with premium Inconel valves on both the intake and exhaust sides. Unlike the Stage 1, which uses standard valves, or the Stage 2, which incorporates Inconel valves only on the intake side, the Stage 3 delivers maximum resilience with Inconel valves throughout, providing superior resistance to extreme heat, pressure, corrosion, pitting, and fracturing. The use of Inconel valves for both intake and exhaust ensures exceptional performance under the most intense conditions, such as those encountered with high-horsepower modifications like marine camshafts, high-flow injectors, or large turbochargers. These valves withstand blistering temperatures and high-pressure environments, preventing common issues like valve fracturing, which can occur with standard valves in performance-tuned engines. This makes the Stage 3 ideal for heavy-duty applications, including fleet trucks, marine vessels, or racing setups, where reliability and longevity are critical. The Stage 3 cylinder head combines cost-effective engineering with top-tier materials, offering unmatched durability and performance for enthusiasts and professionals pushing their X15 engines to the limit. Note: Any references to OEM names, product IDs, descriptions, or model numbers are used solely for identification purposes and do not imply that this is an OEM part.\u003c\/span\u003e\u003c\/p\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45762011168953,"sku":null,"price":4038.66,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/J4298234IV.png?v=1766804927"},{"product_id":"5658283-cummins-isx15-dual-cam-cylinder-head-stage-3-inconel-valves","title":"5658283 Cummins ISX15 Dual Cam Cylinder Head Stage 3 Inconel Intake \u0026 Exhaust Valves","description":"\u003cdiv data-offset-key=\"t0f3-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\u003cspan data-offset-key=\"t0f3-0-0\"\u003e\u003cspan data-text=\"true\"\u003eJAK's Stage 3 X15 Dual Cam Cylinder Head with Full Inconel Valves\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"block paragraph\" data-block=\"true\" data-editor=\"8mfad\" data-offset-key=\"cqbhj-0-0\"\u003e\n\u003cdiv data-offset-key=\"cqbhj-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\n\u003cspan data-offset-key=\"cqbhj-0-0\"\u003e\u003cspan data-text=\"true\"\u003eJAK's Stage 3 X15 Dual Cam Cylinder Head is the ultimate upgrade for X15 engines, engineered for maximum performance and durability in high-demand applications. Specifically designed for dual cam X15 engine configurations, this head features an OE-equivalent casting material and is equipped with premium \u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"cqbhj-0-1\"\u003e\u003cspan data-text=\"true\"\u003eInconel valves\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"cqbhj-0-2\"\u003e\u003cspan data-text=\"true\"\u003e on both the intake and exhaust sides. Unlike the Stage 1, which uses standard valves, or the Stage 2, which includes Inconel valves only on the intake side, the Stage 3 offers unmatched resilience with Inconel valves throughout, providing superior resistance to extreme heat, pressure, corrosion, pitting, and fracturing.\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"block paragraph\" data-block=\"true\" data-editor=\"8mfad\" data-offset-key=\"ag9qo-0-0\"\u003e\n\u003cdiv data-offset-key=\"ag9qo-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\u003cspan data-offset-key=\"ag9qo-0-0\"\u003e\u003cspan data-text=\"true\"\u003eThe full Inconel valve setup ensures exceptional reliability under intense conditions, such as those created by high-horsepower modifications like marine camshafts, high-flow injectors, or large turbochargers, commonly used in dual cam X15 engines. These valves excel in withstanding blistering temperatures and high-pressure environments, preventing common issues like valve fracturing that can occur with standard valves in performance-tuned setups. Tailored for heavy-duty applications—such as fleet trucks, marine vessels, or racing configurations—the Stage 3 dual cam cylinder head delivers unparalleled durability and performance. This head combines cost-effective engineering with top-tier materials, making it the ideal choice for professionals and enthusiasts pushing their X15 dual cam engines to the absolute limit.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"block paragraph\" data-block=\"true\" data-editor=\"8mfad\" data-offset-key=\"cn92n-0-0\"\u003e\n\u003cdiv data-offset-key=\"cn92n-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\u003cspan data-offset-key=\"cn92n-0-0\"\u003e\u003cspan data-text=\"true\"\u003eNote: Any references to OEM names, product IDs, descriptions, or model numbers are used solely for identification purposes and do not imply that this is an OEM part.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45762666365113,"sku":"JAKS-J4101420IV","price":3760.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/J4101420IV-2.png?v=1766805391"},{"product_id":"23538858-detroit-series-60-14l-cylinder-head-inconel-intake-valves","title":"23538858 Detroit Series 60 14L Cylinder Head Inconel Intake Valves","description":"\u003cdiv data-offset-key=\"ckope-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\u003cstrong\u003e\u003cspan data-offset-key=\"ckope-0-0\"\u003e\u003cspan data-text=\"true\"\u003eAdvantages of JAK's Performance Detroit Diesel S60 14L Cylinder Head\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv data-offset-key=\"ckope-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\u003cspan data-offset-key=\"8tn4e-0-0\"\u003e\u003cspan data-text=\"true\"\u003e\u003cbr\u003eElevate your engine with JAK's premium S60 14L cylinder head, crafted to outperform OEM standards. The casting material is enhanced with 5% additional nickel content to prevent valve-to-valve cracking. Featuring 30% larger coolant passages and strengthened internal ribs, this head reduces thermal stress for superior durability. If you've faced the costly downtime of a cracked cylinder head, avoid the risk of standard remanufactured OEM heads. Choose JAK's performance head for reliable, worry-free performance on long hauls.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv data-offset-key=\"7if4c-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\u003cspan data-offset-key=\"7if4c-0-0\"\u003e\u003cspan data-text=\"true\"\u003eWhat Defines This Enhanced Performance Head?\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cdiv class=\"block paragraph\" data-block=\"true\" data-editor=\"7818d\" data-offset-key=\"8ql98-0-0\"\u003e\n\u003cdiv data-offset-key=\"8ql98-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\n\u003cspan data-offset-key=\"8ql98-0-0\"\u003e\u003cspan data-text=\"true\"\u003eThis upgraded cylinder head surpasses standard designs with advanced casting improvements and \u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"8ql98-0-1\"\u003e\u003cspan data-text=\"true\"\u003eInconel exhaust valves\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"8ql98-0-2\"\u003e\u003cspan data-text=\"true\"\u003e. These high-performance valves withstand extreme temperatures and pressures, addressing the common issue of valve fracturing under high-horsepower conditions. With exceptional resistance to heat, corrosion, pitting, and cracking, this head ensures your engine delivers maximum power and longevity. Ideal for operators seeking enhanced performance and reliability.\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"block paragraph\" data-block=\"true\" data-editor=\"7818d\" data-offset-key=\"ebcu2-0-0\"\u003e\n\u003cdiv data-offset-key=\"ebcu2-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\u003cspan data-offset-key=\"ebcu2-0-0\"\u003e\u003cspan data-text=\"true\"\u003eNote: Any references to OEM names, product IDs, descriptions, or model numbers are used solely for identification purposes and do not imply that this is an OEM part.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45762688647353,"sku":"JAKS-J23538858","price":3657.37,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/j23525566_e18121b0-eb64-426a-9e0c-03a3880fd5de.png?v=1766806179"},{"product_id":"3078380-cummins-n14-cylinder-head-stage-1-regular-valves","title":"3078380 Cummins N14 Cylinder Head Stage 1 Regular Intake \u0026 Exhaust Valves","description":"\u003ch3 dir=\"auto\"\u003eBenefits of JAK's Diesel Performance Cylinder Head\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eBrand new, fully assembled performance cylinder head compatible with Cummins N14 engines. Our castings are proudly engineered, designed, and built in the USA. They exceed standard quality with \u003cstrong\u003e5% higher nickel content\u003c\/strong\u003e in the material, which strengthens the head and helps prevent cracks between valve seats.\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eWe've also increased coolant passage size by \u003cstrong\u003e30%\u003c\/strong\u003e and added reinforced internal ribs to better manage heat and reduce thermal stress. If you've dealt with a cracked cylinder head before, you know the downtime and expense involved. Avoid risking a repeat failure with a basic remanufactured unit—upgrade to JAK's Diesel Enhanced Performance Cylinder Head for reliable, worry-free operation on long hauls!\u003c\/p\u003e\n\u003ch3 dir=\"auto\"\u003eWhat Makes This Enhanced Performance Cylinder Head Special?\u003c\/h3\u003e\n\u003cp dir=\"auto\"\u003eThis is a true performance upgrade over a standard cylinder head. If you're pushing your engine harder for more power and want protection against corrosion, pitting, or cracking, this is the ideal cylinder head upgrade!\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eAny reference to original manufacturer names, part numbers, or descriptions is solely for compatibility and identification purposes and does not imply that this is an original manufacturer part.\u003c\/p\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45765625184441,"sku":"JAKS-J3078380","price":1074.35,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/3078380-1_copy.jpg?v=1766861022"},{"product_id":"2190203-paccar-mx13-epa13-cylinder-head-inconel-valves-cgi","title":"2190203 PACCAR MX13 EPA13 Cylinder Head Inconel Intake \u0026 Exhaust Valves CGI","description":"\u003cdiv data-offset-key=\"6f6bf-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\u003cstrong\u003e\u003cspan data-offset-key=\"6f6bf-0-0\"\u003e\u003cspan data-text=\"true\"\u003ePaccar MX13 JAK's Premium Cylinder Head\u003c\/span\u003e\u003c\/span\u003e\u003c\/strong\u003e\u003c\/div\u003e\n\u003cdiv class=\"block paragraph\" data-block=\"true\" data-editor=\"23hre\" data-offset-key=\"bhfvb-0-0\"\u003e\n\u003cdiv data-offset-key=\"bhfvb-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\n\u003cspan data-offset-key=\"bhfvb-0-0\"\u003e\u003cspan data-text=\"true\"\u003eTransform your Paccar MX13 engine with JAK's high-performance cylinder head, crafted from advanced \u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"bhfvb-0-1\"\u003e\u003cspan data-text=\"true\"\u003eCompacted Graphite Iron (CGI)\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"bhfvb-0-2\"\u003e\u003cspan data-text=\"true\"\u003e for exceptional durability and thermal resistance. Unlike standard OEM castings, which are susceptible to cracking under high temperatures and stress, our CGI material—fortified with enhanced strength—offers \u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"bhfvb-0-3\"\u003e\u003cspan data-text=\"true\"\u003e75% greater tensile strength\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"bhfvb-0-4\"\u003e\u003cspan data-text=\"true\"\u003e, \u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"bhfvb-0-5\"\u003e\u003cspan data-text=\"true\"\u003e45% higher stiffness\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"bhfvb-0-6\"\u003e\u003cspan data-text=\"true\"\u003e, and \u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"bhfvb-0-7\"\u003e\u003cspan data-text=\"true\"\u003edouble the fatigue resistance\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"bhfvb-0-8\"\u003e\u003cspan data-text=\"true\"\u003e, ensuring superior reliability in demanding conditions.\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"block paragraph\" data-block=\"true\" data-editor=\"23hre\" data-offset-key=\"co2h2-0-0\"\u003e\n\u003cdiv data-offset-key=\"co2h2-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\n\u003cspan data-offset-key=\"co2h2-0-0\"\u003e\u003cspan data-text=\"true\"\u003eThis cylinder head features \u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"co2h2-0-1\"\u003e\u003cspan data-text=\"true\"\u003eInconel intake and exhaust valves\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"co2h2-0-2\"\u003e\u003cspan data-text=\"true\"\u003e, a superalloy renowned for its outstanding resilience at extreme temperatures. Inconel valves provide unmatched resistance to oxidation, corrosion, and thermal fatigue compared to standard valve materials, making them perfect for high-performance diesel engines under continuous heavy loads. These valves maintain consistent sealing and minimize wear, even in the most challenging environments, boosting engine efficiency and longevity.\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv data-offset-key=\"fhhh1-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\u003cspan data-offset-key=\"fhhh1-0-0\"\u003e\u003cspan data-text=\"true\"\u003eKey Features:\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003cul class=\"public-DraftStyleDefault-ul\" data-offset-key=\"dntcv-0-0\"\u003e\n\u003cli class=\"block public-DraftStyleDefault-unorderedListItem public-DraftStyleDefault-reset public-DraftStyleDefault-depth0 public-DraftStyleDefault-listLTR\" data-block=\"true\" data-editor=\"23hre\" data-offset-key=\"dntcv-0-0\"\u003e\n\u003cdiv data-offset-key=\"dntcv-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\n\u003cspan data-offset-key=\"dntcv-0-0\"\u003e\u003cspan data-text=\"true\"\u003eAdvanced CGI Casting\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"dntcv-0-1\"\u003e\u003cspan data-text=\"true\"\u003e: Delivers superior crack resistance and thermal stability, far surpassing OEM castings.\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"block public-DraftStyleDefault-unorderedListItem public-DraftStyleDefault-depth0 public-DraftStyleDefault-listLTR\" data-block=\"true\" data-editor=\"23hre\" data-offset-key=\"o48i-0-0\"\u003e\n\u003cdiv data-offset-key=\"o48i-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\n\u003cspan data-offset-key=\"o48i-0-0\"\u003e\u003cspan data-text=\"true\"\u003eInconel Intake \u0026amp; Exhaust Valves\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"o48i-0-1\"\u003e\u003cspan data-text=\"true\"\u003e: Exceptional heat and pressure resistance reduces valve failure and enhances engine performance.\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"block public-DraftStyleDefault-unorderedListItem public-DraftStyleDefault-depth0 public-DraftStyleDefault-listLTR\" data-block=\"true\" data-editor=\"23hre\" data-offset-key=\"2a173-0-0\"\u003e\n\u003cdiv data-offset-key=\"2a173-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\n\u003cspan data-offset-key=\"2a173-0-0\"\u003e\u003cspan data-text=\"true\"\u003ePrecision Fit\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"2a173-0-1\"\u003e\u003cspan data-text=\"true\"\u003e: Engineered for a seamless, direct replacement on Paccar MX13 engines.\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003cli class=\"block public-DraftStyleDefault-unorderedListItem public-DraftStyleDefault-depth0 public-DraftStyleDefault-listLTR\" data-block=\"true\" data-editor=\"23hre\" data-offset-key=\"dod8f-0-0\"\u003e\n\u003cdiv data-offset-key=\"dod8f-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\n\u003cspan data-offset-key=\"dod8f-0-0\"\u003e\u003cspan data-text=\"true\"\u003eUncompromising Durability\u003c\/span\u003e\u003c\/span\u003e\u003cspan data-offset-key=\"dod8f-0-1\"\u003e\u003cspan data-text=\"true\"\u003e: Built to exceed OEM specifications for long-lasting performance.\u003c\/span\u003e\u003c\/span\u003e\n\u003c\/div\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003cdiv class=\"block paragraph\" data-block=\"true\" data-editor=\"23hre\" data-offset-key=\"folbm-0-0\"\u003e\n\u003cdiv data-offset-key=\"folbm-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\u003cspan data-offset-key=\"folbm-0-0\"\u003e\u003cspan data-text=\"true\"\u003eDesigned for fleets, owner-operators, and performance enthusiasts, JAK's MX13 cylinder head ensures unmatched durability and reliability, keeping your engine running strong under any conditions.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"block paragraph\" data-block=\"true\" data-editor=\"23hre\" data-offset-key=\"7skrg-0-0\"\u003e\n\u003cdiv data-offset-key=\"7skrg-0-0\" class=\"public-DraftStyleDefault-block public-DraftStyleDefault-ltr\"\u003e\u003cspan data-offset-key=\"7skrg-0-0\"\u003e\u003cspan data-text=\"true\"\u003eNote: Any references to OEM names, product IDs, descriptions, or model numbers are used solely for identification purposes and do not imply that this is an OEM part.\u003c\/span\u003e\u003c\/span\u003e\u003c\/div\u003e\n\u003c\/div\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45765660541113,"sku":"JAKS-J2190203","price":4650.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/Screenshot2025-10-22131923.png?v=1766861440"},{"product_id":"1620683-caterpillar-c10-c12-cylinder-head-regular-valves","title":"1620683 Caterpillar C10 \/ C12 Cylinder Head Regular Intake \u0026 Exhaust Valves","description":"\u003cp\u003e\u003cstrong\u003e\u003cspan style=\"font-size: 0.875rem;\"\u003eBenefits of JAK's Diesel Performance Cylinder Head\u003c\/span\u003e\u003c\/strong\u003e\u003c\/p\u003e\n\u003cp dir=\"auto\"\u003eBrand new, fully loaded cylinder head engineered for superior performance and durability. Our castings surpass OEM standards with \u003cstrong\u003e5% higher nickel content\u003c\/strong\u003e in the material. This enhanced nickel composition significantly reduces the risk of cracking between valves. Plus, coolant passages are enlarged by \u003cstrong\u003e30%\u003c\/strong\u003e, and internal ribs are reinforced to better manage heat stress and prevent overheating.\u003c\/p\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45771120378041,"sku":"JAKS-J1620683","price":2854.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/c12.jpg?v=1766949913"},{"product_id":"3417269-cummins-ism-m11-cylinder-head-regular-valves","title":"3417269 Cummins ISM \/ M11 Cylinder Head Regular Intake \u0026 Exhaust Valves","description":"\u003ch3 dir=\"auto\" class=\"text-xl\"\u003eBenefits of JAK's Diesel Performance ISM Cylinder Head\u003c\/h3\u003e\n\u003cp dir=\"auto\" class=\"break-words last:mb-0\"\u003eBrand new and fully equipped Cummins ISM cylinder head, designed with top-tier craftsmanship. Our castings exceed OEM standards with \u003cstrong class=\"font-semibold\"\u003e5% higher nickel content\u003c\/strong\u003e in the material, significantly reducing the likelihood of cracking between valves. Plus, coolant passages are expanded by \u003cstrong class=\"font-semibold\"\u003e30%\u003c\/strong\u003e, and internal ribs are strengthened to minimize heat stress. If you’ve dealt with a cracked cylinder head before, you know the hefty repair costs involved! Avoid the risk of another failure with an OE reman head—upgrade to JAK's Diesel Enhanced Performance Cylinder Head for reliable performance and peace of mind on every haul!\u003c\/p\u003e","brand":"JAK's Diesel","offers":[{"title":"Default Title","offer_id":45771181162681,"sku":"JAKS-J3417269","price":2783.0,"currency_code":"USD","in_stock":false}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0753\/6171\/4361\/files\/3417269-1.jpg?v=1766950901"},{"product_id":"cat-3406e-c15-c16-c18-remanufactured-cylinder-head-kit-pai-360461-jaks-diesel","title":"CAT 3406E C15 C16 C18 Remanufactured Cylinder Head Kit | PAI 360461 | JAK's Diesel","description":"\u003cp\u003e\u003cstrong\u003eGenuine PAI 360461 Remanufactured Cylinder Head Kit\u003c\/strong\u003e for Caterpillar 3406E, C15, C16, and C18 engines. Complete kit with valve guides, seals, cam bearings, injector sleeves, and retainer collets. Component of PAI 360462-102 Head Rebuild Kit. Genuine PAI tier with 2-year unlimited mileage warranty.\u003c\/p\u003e\u003ch3\u003eEngine Fitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngines:\u003c\/strong\u003e CAT 3406E\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngines:\u003c\/strong\u003e CAT C15 \/ C15 Acert\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngines:\u003c\/strong\u003e CAT C16, CAT C18\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Cylinder head rebuild during top-end overhaul\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat's In The Kit\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e24 × \u003cstrong\u003e391994 (122-7375)\u003c\/strong\u003e Valve Guides\u003c\/li\u003e\n\u003cli\u003e24 × \u003cstrong\u003e392011 (1632478)\u003c\/strong\u003e Seals\u003c\/li\u003e\n\u003cli\u003e7 × \u003cstrong\u003e351553 (4P5053)\u003c\/strong\u003e Cam Bearings STD\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e392087 (2634920)\u003c\/strong\u003e Injector Sleeves\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e321318\u003c\/strong\u003e O-Ring\u003c\/li\u003e\n\u003cli\u003e48 × \u003cstrong\u003e192024 (S-2037)\u003c\/strong\u003e Retainer Collets\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM Cross-Reference\u003c\/h3\u003e\u003cp\u003e\u003cem\u003eNote: No OEM cross-reference numbers are listed on the PAI portal for this part. Contact JAK's Diesel with your engine's required CAT part number for fitment confirmation.\u003c\/em\u003e\u003c\/p\u003e\u003ch3\u003eWarranty \u0026amp; Tier\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eTier:\u003c\/strong\u003e Genuine PAI\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eWarranty:\u003c\/strong\u003e 2 Years, Unlimited Mileage\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eManufacturer:\u003c\/strong\u003e PAI Industries\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003ePackage \u0026amp; Shipping\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eWeight:\u003c\/strong\u003e 9.16 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Size:\u003c\/strong\u003e 9\" × 9\" × 7\"\u003c\/li\u003e\n\u003cli\u003eDrop-ships from PAI to your door\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PAI Industries","offers":[{"title":"Default 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