PRXB Exhaust Brake Kit – C44037 – DirectMount 4 Inch Exhaust (Air Actuated) LB7 Duramax " Measured Flow: 270 CFM @

Measured Flow: 270 CFM @ 7" H2O

Smooth plenum expansion creates signature performance inline-6 appearance

The Evolution increases horsepower and torque and not only does it re-tune your vehicle

Part Number: II901-R1

PRXB Exhaust Brake Kit – C44037 – DirectMount 4 Inch Exhaust (Air Actuated) LB7 Duramax " Measured Flow: 270 CFM @Product Description Provides 50 percent More Braking Power at Lower RPM's. PRXB gives you the best holdback in the 1400 1800 RPM range (where you typically drive). The spring controlled pressure regulated mechanism on the exhaust brakes protects against engine overpressure. When the brake is deactivated, exhaust flow is unrestricted and won't interfere with power output. Patented 90 degree Non contacting Butterfly Valve is specially engineered to