Pacbrake’s flagship
product, the PRXB (pressure regulated exhaust brake), is the unquestioned
leader in the supplemental brake industry. The patented PRXB design delivers
the strongest braking horsepower, greatest speed reductions and shortest
stopping distances possible without the use of service brakes. It maintains
optimum retarding performance by maximizing the exhaust backpressure
throughout the entire RPM range. Unlike a typical exhaust brake, which
requires high RPMs to work properly, the PRXB delivers constant exhaust
pressure (braking) as early as 1200 RPM through to the maximum allowable RPM.

Chev/GMCDuramax 6.6
LLY/LBZ2006Chev/GMCDuramax 6.6 LLY/LBZ2007