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
Shipping
Cylinder Heads
Delivery
Backed Products
Featured Categories
The components that keep fleets running — heads, turbos, and complete rebuild kits, in stock and ready to ship.
Shop By Engine
Every platform we cover — drill straight to the heads, kits, injectors, turbos, bearings and seals that fit your engine.
C12 · C7
ISM · ISL
DD15 · DD16
D11 · D13 · D16
PX-9 · PX-7
A26 · DT466
JAK'S Performance Heads
Built and flow-tested in-house. Four stages of proven horsepower and durability for the platforms that work the hardest — backed by our own warranty.
Stage 1
Stage 2
Stage 3
Need a Cross Reference?
Enter any OEM, dealer, or competitor number. We'll match it to the exact part — and tell you what it fits and whether it ships today.
Why Buy From JAK'S Diesel
Diesel Expertise
Real engine knowledge from techs who've turned the wrenches — not order-takers.
Fast Shipping
In-stock parts ship same day, nationwide. Downtime costs money — we move fast.
Technical Support
Speak with experienced diesel professionals before and after the sale.
Quality Products
PAI and premium suppliers only. Parts we'd put in our own trucks.
Warranty Protection
Backed by genuine support after the sale — we stand behind every part.
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.