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04.5-07 Dodge 5.9L Cummins Manual Trans w/Existing Air PacBrake PRXB Exhaust Brake

Fits: 2004.5-2007 Dodge 5.9L Cummins Diesel trucks with manual transmissions.
Works with aftermarket S300 turbos which utilize the stock cast-iron elbow.

Diesel engines, unlike gasoline engines, don't slow down simply by taking your foot off the accelerator; they rely on service and supplemental brakes. An exhaust brake is a form of a supplemental brake, and they work much differently than their conventional counterparts.

Introducing the Pacbrake PRXB

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.

Controlled by a master ON/OFF switch, Pacbrake’s exhaust brakes provide whisper quiet supplemental braking that allows service brakes to be used much less, ultimately saving you money. They have the ability to be left on all the time, making it ideal for in-city driving or for steep, downhill grades. This product pays for itself as less wear on the brake pads means fewer brake jobs. 

This kit does NOT include air compressor.


04.5 Dodge Built Jan 5, 2004- July 25, 04 Standard Transmission

05 Dodge Built July 25, 04- June 27, 05 Standard Transmission

06-07 Dodge Built June 28, 05 and newer

PacBrake part number:  C44037

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