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

When these fluids are contaminated it can cause premature wear on engine and turbocharger bearings or even engine failure from a lack of lubrication or overheating due to a constriction within the fluid passages inside the block and engine components like your EGR Cooler

RR COMP BOX 3

0L Turbo SYS C/B

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