PRXB Exhaust Brake Kit – C44030 – DirectMount 4 Inch Exhaust (Air Actuated) " All 2011 - 2023 GMC Sierra

2011 - 2023 GMC Sierra 3500 HD

With our engineering on the XP Series K16 pumps you can produce more fuel output with less pumps

This allows up to 100 percent of the retarding force to be transferred while in 3rd and 4th gear

Part Number: 1045778

Supplied with new factory gasket

PRXB Exhaust Brake Kit – C44030 – DirectMount 4 Inch Exhaust (Air Actuated) " All 2011 - 2023 GMC SierraProduct 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