Sinister Diesel Billet Valve Covers for 2004.5-2010 Duramax LLY, LBZ, LMM. Fuel Pressure Regulator Developed and engineered in the

Developed and engineered in the USA

All backed by an industry leading warranty

RR COMP BOX 3

Standards Sold As A Pair Does Not Fit Models With Factory HID Bulbs

Sinister Diesel Billet Valve Covers for 2004.5-2010 Duramax LLY, LBZ, LMM. Fuel Pressure Regulator Developed and engineered in theThis product is Sinister Diesel's Billet Valve covers for the 2004. 5 2010 Duramax will help clean up the engine bay, and add a little more clearance for custom turbo or fuel upgrades. These are fully CNC machined, then they are anodized in the Sinister Blue color for good looks and a long life. These retain the factory Fuel Filter housing as well as the Radiator hose hard line. These DO NOT have any other provisions for wiring harnesses or