ITEM NAME:New Black Turbo Boost Valve Fit for Duramax Lb7 6.6L Chevy 01-04 G4P2 New Black Turbo Boost Valve Fit for Duramax Lb7 6.6L Chevy 01-04 G4P2 Color:black Material: aluminum alloy Size: about 5.4cm Inner diameter: 5mm Features increase the performance and efficiency of your engine. Will increase your boost by an additional 10-15 PSI. Additional boost increases horsepower and fuel efficiency. Also reduces exhaust gas temperatures (EGT). Works well with other turbo supporting mods or for engine tuning applications. Anodized black for a fit and finish that will last. Fit For: For 2001-2004 for GM 6.6L for Duramax LB7 crude oil 6.6L for Duramax LB7 crude oil engine Package Contents: 1 * booster valve 2 * clamps