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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":"ra4721400475-detroit-dd15-egr-cooler-epa10-ghg14-pai-641333-jaks-diesel","title":"RA4721400475 Detroit DD15 EGR Cooler EPA10 GHG14 | PAI 641333 | JAK's Diesel","description":"\u003cp\u003e\u003cstrong\u003eGenuine PAI 641333 EGR Cooler\u003c\/strong\u003e for Detroit Diesel DD15 engines (EPA10 \/ GHG14). 32.75\" length. Replaces 6 Detroit OEM numbers across the A\/EA\/RA prefix variants. Complete assembly. 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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\u003eEngine:\u003c\/strong\u003e Detroit Diesel DD15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore Size:\u003c\/strong\u003e 139.000mm\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eRing Count:\u003c\/strong\u003e 3-ring set\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eOEM Cross-Reference\u003c\/h3\u003e\u003ctable border=\"1\" cellpadding=\"6\" cellspacing=\"0\"\u003e\n\u003cthead\u003e\u003ctr\u003e\n\u003cth\u003eManufacturer\u003c\/th\u003e\n\u003cth\u003eOEM Part Number\u003c\/th\u003e\n\u003c\/tr\u003e\u003c\/thead\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetroit Diesel\u003c\/td\u003e\n\u003ctd\u003e\u003cstrong\u003eA4720300624\u003c\/strong\u003e\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetroit Diesel\u003c\/td\u003e\n\u003ctd\u003eA4720300524\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetroit Diesel\u003c\/td\u003e\n\u003ctd\u003eA4720300724\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003eDetroit Diesel\u003c\/td\u003e\n\u003ctd\u003eA4730300024\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e\u003ch3\u003eHigh Performance Variant\u003c\/h3\u003e\u003cul\u003e\u003cli\u003e\n\u003cstrong\u003ePAI 605084HP\u003c\/strong\u003e — High Performance piston ring set available with extended warranty\u003c\/li\u003e\u003c\/ul\u003e\u003ch3\u003eQuality \u0026amp; Testing\u003c\/h3\u003e\u003cp\u003ePAI piston rings are precision designed and measured in a 3D environment. Each set is dyno and road tested for 100% functionality. Certified for high-stress environments.\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 0.34 lbs\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003ePackage Size:\u003c\/strong\u003e 6\" × 6\" × 1\"\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 Title","offer_id":47289307693241,"sku":"JAKS-605084","price":109.99,"currency_code":"USD","in_stock":true}]},{"product_id":"dd1551-001-detroit-dd15-pistonless-inframe-engine-kit-150mm-non-apr-pai-jaks-diesel","title":"DD1551-001 Detroit DD15 Pistonless Inframe Engine Kit 150mm Non-APR | PAI | JAK's Diesel","description":"\u003cp\u003e\u003cstrong\u003eGenuine PAI DD1551-001 Pistonless Inframe Engine Kit\u003c\/strong\u003e for Detroit DD15 engines. 150mm non-APR liner kit — re-ring application (no pistons included). 6-cylinder kit at ~50% the cost of a full inframe.\u003c\/p\u003e\u003ch3\u003eEngine Fitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Detroit Diesel DD15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e 150mm Non-APR\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Re-ring rebuild (reuse existing pistons)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat's In The Kit\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e6 × \u003cstrong\u003e661628 (A4720111810)\u003c\/strong\u003e Liner Kits\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e605079 (A4720300324)\u003c\/strong\u003e Piston Ring Sets\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e040127 (3900630)\u003c\/strong\u003e Screws\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e645031 (A4721800043)\u003c\/strong\u003e Piston Cooling Nozzles\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e631401\u003c\/strong\u003e Head Gasket Kit\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e631359 (A4720140322)\u003c\/strong\u003e Pan Gasket\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e671575A\u003c\/strong\u003e Connecting Rod Bearing Kit\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e671585A\u003c\/strong\u003e Main Bearing Kit\u003c\/li\u003e\n\u003cli\u003e12 × \u003cstrong\u003e640055 (A4720380071)\u003c\/strong\u003e Connecting Rod Bolts\u003c\/li\u003e\n\u003cli\u003e14 × \u003cstrong\u003e640056 (A0000111071)\u003c\/strong\u003e Main Bolts\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDD1551-001 vs DD1551-145\u003c\/h3\u003e\u003cp\u003eDD1551-001 = 150mm non-APR liners. 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Includes piston ring set 605084 for re-ring of existing pistons.\u003c\/p\u003e\u003ch3\u003eEngine Fitment\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e\n\u003cstrong\u003eEngine:\u003c\/strong\u003e Detroit Diesel DD15\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eBore:\u003c\/strong\u003e 139mm APR Ring\u003c\/li\u003e\n\u003cli\u003e\n\u003cstrong\u003eApplication:\u003c\/strong\u003e Re-ring rebuild (reuse existing pistons)\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eWhat's In The Kit\u003c\/h3\u003e\u003cul\u003e\n\u003cli\u003e6 × \u003cstrong\u003e661626 (A4720111910)\u003c\/strong\u003e Liner Kits\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e605084 (A4720300624)\u003c\/strong\u003e Piston Ring Sets\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e645031 (A4721800043)\u003c\/strong\u003e Piston Cooling Nozzles\u003c\/li\u003e\n\u003cli\u003e6 × \u003cstrong\u003e040127 (3900630)\u003c\/strong\u003e Screws\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e631359 (A4720140322)\u003c\/strong\u003e Pan Gasket\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e631400\u003c\/strong\u003e Head Gasket Kit\u003c\/li\u003e\n\u003cli\u003e12 × \u003cstrong\u003e640055 (A4720380071)\u003c\/strong\u003e Connecting Rod Bolts\u003c\/li\u003e\n\u003cli\u003e14 × \u003cstrong\u003e640056 (A0000111071)\u003c\/strong\u003e Main Bolts\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e671575A\u003c\/strong\u003e Connecting Rod Bearing Kit\u003c\/li\u003e\n\u003cli\u003e1 × \u003cstrong\u003e671585A\u003c\/strong\u003e Main Bearing Kit\u003c\/li\u003e\n\u003c\/ul\u003e\u003ch3\u003eDD1551-001 vs DD1551-145\u003c\/h3\u003e\u003cp\u003eDD1551-145 = 139mm APR-ring liners. 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