PRXB Exhaust Brake Kit – C44030 – DirectMount 4 Inch Exhaust (Air Actuated) " All Cylinder Head Bolts Not Included

Cylinder Head Bolts Not Included MAHLE Original head gasket sets are packaged in shrink wrapped tray

BD traction bars are engineered to precisely follow the OEM spring travel sweep and axle rotation

the entire fuel system requires replacement after metal debris from the failed pump spreads throughout

2011 - 2023 GMC Sierra 3500 HD

Part Number: 1045778

PRXB Exhaust Brake Kit – C44030 – DirectMount 4 Inch Exhaust (Air Actuated) " All Cylinder Head Bolts Not IncludedProduct 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