Freedom Series Duramax Cylinder Head with Cupless Injector Bore for 2001-2004 LB7 (Driver Side) Fleece Performance

A fresh Duramax head

Fleece's LB7 head has a cupless injector bore, which means no injector cups at all, which removes a coolant leak point and makes the install simpler.

Fleece assembles each head from a new aluminum casting in its own engine shop, to meet or beat factory specs. Every head is inspected and pressure and leak tested, with new valves, guides, springs and valve seals and a CNC-cut multi-angle valve job, for a daily driver or a tow rig.

Who it's for

Owners of 2001-2004 Chevrolet Silverado / GMC Sierra 2500/3500 with the LB7 Duramax who need a replacement cylinder head.

Key specs (per Fleece)

What's included

• Freedom Series Duramax cylinder head (driver side, sold each)

Fitment notes

• Fits 2001-2004 Chevrolet Silverado / GMC Sierra 2500/3500 with the LB7 Duramax (per Fleece).
• This is the driver side head; the other side is sold separately.
• Head gasket not included; Fleece recommends GM 12637788 (Grade C, right) and GM 12637785 (Grade C, left).
• Federal-spec trucks only; it does not fit trucks originally delivered in California (per Fleece).

Professional install available at Powertech Diesel, Idaho Falls — call 208-542-7793.