Freedom Series Duramax Cylinder Head for 2004.5-2005 LLY (Passenger Side) Fleece Performance

A fresh Duramax head

Fleece builds its Freedom Series Duramax heads in its own engine shop to meet or beat factory specs. Each one starts as a new casting and is inspected and pressure and leak tested, with new valve guides, springs and valve seals.

They keep stock-size valves, precision ground at a 45-degree angle, plus a multi-angle valve job. That makes them a good fit for a daily driver or a tow rig.

Who it's for

Owners of 2004.5-2005 Chevrolet Silverado / GMC Sierra 2500/3500 with the LLY Duramax who need a replacement cylinder head.

Key specs (per Fleece)

What's included

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

Fitment notes

• Fits 2004.5-2005 Chevrolet Silverado / GMC Sierra 2500/3500 with the LLY Duramax (per Fleece).
• This is the passenger 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).

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