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Pacbrake PRXB Exhaust Brake, Dodge (2003-04) 5.9L Cummins, Manual Transmission, Direct Turbo Mount

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.

Pacbrake and KT Performance keep things simple for you. We provide a total package of quality service and parts. There are a number of components required to operate an exhaust brake, but we conveniently include everything you need in this exhaust brake kit. Every exhaust brake requires an air compressor and air tank to operate. Often mounted under the hood, Pacbrake’s air compressor builds up pressure in the air tank that is released during braking.

Pacbrake’s 0.5 gallon air tank works with the exhaust brake and air compressor to speed up the exhaust brake cylinder activation. It does this by storing air pressure (created by the compressor) and holding it until needed. Outside the air tank there is a 135 PSI pressure switch that controls the amount of air pressure contained inside. As the pressure drops a signal is sent to the compressor to create more air, thereby filling the tank back to its full capacity.

Generally frame mounted, this onboard air tank also provides an air source for operating air horns and air springs (as well as any other air-operated accessories your vehicle may have). PLEASE NOTE: If you are operating more than one air operated product and prefer a larger air tank and/or compressor, upgrades are available.

A 25ft curly hose with an assortment of accessories is also included and easily stored in a heavy duty nylon bag. Just attach the curly hose to the quick disconnect chuck off of the air compressor (your external air source) and you’re able to perform a variety of jobs with your air system.
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Sale: $1,369.01
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Dodge 2003 and newer vehicles are installed using a direct mount configuration. This type of install does not require adapters as one side of the brake attaches directly to the turbocharger and the other side directly to the exhaust pipe.


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  • Item Requires Shipping
  • 32.0 lbs.
  • W0.0000” x H9.0000” x L18.0000”
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