4" PRXB Exhaust brake kit with maximum exhaust flow design (air actuated) directmount comes with air tank/hose and accessory kit and heavy duty exhaust valve springs.

Our Pressure Regulated Exhaust Brake (PRXB) offers the highest retarding power for the lowest price available. Although the PRXB’s retarding power is comparable to that of a compression release engine brake, the manufacturing and installation costs are significantly less.

Conventional exhaust brakes experience a reduced exhaust back pressure at low engine speeds, resulting in an unnecessary loss of braking power. Pacbrake's innovative PRXB addresses this issue with a patented wastegate design that regulates exhaust back pressure as engine speed changes. The valve maintains near constant engine backpressure throughout the entire RPM range, providing maximum exhaust braking power at all times.

KEY FEATURES

·         High Reliability

·         Severe duty approved

·         Pressure regulating wastegate in butterfly

·         High temperature and new emission compliant

·         Decreased friction brake wear

·         Low noise output

·         Near constant backpressure throughout the entire RPM range (2-3% tolerance)

·         No overpressure potential

·         Additional performance and safety when used in conjunction with the weeper brake