With 1/3 more retarding horsepower than  a fixed office exhaust brake at 1500 RPM and the same easy direct installation,PRXB is a revolutionary advancement in exhaust brake technology!

The GMC PRXB exhaust brake has been engineered  to maxmimize braking power as the new superior diesign allows for us constant backpressure as engine speeds change, maintaining optimum retarding performance through the entire RPM range. 

Silent retarding allows the driver safety and control in the besiest urban areas where engine brakes are prohibited.

Installing the PRXB on the GMC diesel  truck will enhance exhaust brake performance at mid-range decreasing the number of brake relines by as many as 5 times over the life the vichicle. The customer could SAVE up to $7500 in maintance costs which increases their return on investment and more importantly provides added control for peace of mind.