The Parts Behind
The Power
OEM cross references, performance cylinder heads, and rebuild kits for Caterpillar, Cummins, Detroit, Mack, Volvo, Paccar & International engines — backed by real diesel techs, not a call center.
References
Experts
Eligible Stock
Cylinder Heads
Delivery
Warranty
Featured Categories
Browse heads, turbos, rebuild kits, and other heavy-duty diesel parts with current product availability.
Shop By Engine
Browse heads, kits, injectors, turbos, bearings, and seals by engine platform.
C12 · C7
ISM · ISL
DD15 · DD16
D11 · D13 · D16
PX-9 · PX-7
A26 · DT466
JAK'S Performance Heads
Compare available performance head configurations, current pricing, and fitment with a diesel specialist.
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DIESEL
Cross a number now
Search the catalog by OEM, dealer, or competitor number. Results are candidates; confirm fitment and availability on the product page or with a specialist.
Why Buy From JAK'S Diesel
Diesel Expertise
Real engine knowledge from techs who've turned the wrenches — not order-takers.
Fast Shipping
Most parts drop-ship from PAI's U.S. warehouses — typically 3–5 business days coast to coast for in-stock items.
Technical Support
Speak with experienced diesel professionals before and after the sale.
Quality Products
Genuine PAI Industries and other name-brand aftermarket parts, built to the same specs dealers charge OEM markup for — brand shown on every listing.
Warranty Protection
Most PAI parts carry a 2-year unlimited-mileage warranty — 3 years on the High Performance tier. Full terms on every product page.
We Serve
Whoever keeps diesel moving — find your account and the pricing built for it.
Can't Find It? We Will.
Send us the number off the part — text a photo of the tag. A diesel specialist will track it down.