Boost Increase Valve for 01-04 Duramax 6.6L LB7 Chevy Silverado GMC Sierra by FGT Motorsport High performance Boost Valve for your Chevy/GMC Duramax Diesel Engine (Fits 2001-2004 Chevrolet Silverado 2500/3500 Duramax AND 2001-2004 GMC Sierra 2500/3500) Installs in minutes and increases boost pressure on your LB7 Duramax from 18-20 PSI to 28-30 PSI which increases Horsepower! Machined from aircraft grade billet aluminum and anodized red for durability! Install the custom designed Boost Valve by simply splicing into the hose running between the turbo and the wastegate. Each kit includes two hose clamps, an FGT Boost valve, and comprehensive instructions for a hassle free installation!