Application: 2004.5-2009 Duramax LLY, LBZ, and LMM diesel engines
The Boost Controller was specifically designed for 2004.5 through 2009 Duramax diesel engines and provides additional boost (up to 20 psi) and horsepower (up to 65 hp) with the turn of an adjustable knob and reduces exhaust gas temperatures (EGTs).
Note: “Legal in California only for racing vehicles which may never be used upon a highway.”