Notice the difference while driving through mountain passes & down steep hills
The PRXB delivers the strongest braking horsepower, greatest speed reductions and shortest stopping distances possible without the use of service brakes. Unlike a typical exhaust brake which requires high RPMs to work correctly, the patented PRXB delivers maximum exhaust backpressure (braking) as early as 1200 RPM and continues through to the highest allowable engine RPM.
With the PRXB there is a less than 10% change in backpressure throughout the entire operating RPM range. This is a result of a wastegate integrated into the butterfly valve that regulates the amount of exhaust flow being passed through. The flow is controlled by a spring loaded arm, whose pressure rating and location are key factors in the functionality of the PRXB. Located outside of the housing and away from the heat, the spring is able to maintain its strength and durability for years of proper and precise braking performance.
Tow & haul with complete control!