{"title":"Performance Heads","description":"\u003cp\u003eJAK's Diesel performance cylinder heads for Caterpillar, Cummins, Detroit, and more. Available in Stage 1 (stock-spec), Stage 2 (upgraded intake valves), Stage 3 (all-Inconel), and Stage 6 (maximum performance) builds. Pressure-tested, fully assembled, and backed by our warranty.\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":"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":"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"}],"url":"https:\/\/www.jaksdiesel.com\/collections\/performance-heads.oembed","provider":"JAKs Diesel","version":"1.0","type":"link"}