PPE Boost Increase Valve, Chevy/GMC (2001-04) 6.6L Duramax LB7

The Boost Increase Valve, is designed for 01-04 Duramax LB7 diesel engines, increases boost pressure from 18-20 PSI to 28-30 PSI for additional horsepower and reduces EGT (exhaust gas temperatures). Additional fueling may be needed to gain higher boost levels. **Note: “Legal in California only for racing vehicles which may never be used upon a highway.”