WHAT IS A PRXB?
A PRXB is a Pressure Regulated Exhaust Brake that 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.

HOW IS IT DIFFERENT FROM A STANDARD FIXED ORIFICE EXHAUST BRAKE?
Conventional exhaust brakes experience a reduced exhaust backpressure 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 backpressure as engine speed changes. The valve maintains near constant engine backpressure throughout the entire RPM range, providing maximum exhaust braking power at all times.

KIT CONTENTS:
Every PRXB Kit comes with a everything required for a complete installation:
PRXB Kits Include
PRXB Exhaust Brake
Controller (when required for application)
AMP Onboard Air Kit, which includes:

HP325 Series Compressor
½ Gal Air Tank
25ft Coiled Air Hose
Air Accessories & Fittings Kit