Pacbrake PRXB Exhaust Brakes - Inline Mount for 2007.5-2017 Dodge Cummins


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$1,776.81 - $1,984.58

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Product Details

Product Name: InlineMount PRXB Exhaust Brake
Manufacturer: Pacbrake
Fitment Notes: 2007.5-2016 Dodge Cummins


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.


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.

PRXB offers the highest braking power to lowest price ratio available. Pacbrake's flagship product is the unquestioned leader in the supplemental brake industry. It has changed the way people think about exhaust brakes by providing performance, safety and durability that is unmatched by any other exhaust brake on the market.

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 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.


  • The spring controlled pressure regulated mechanism on the exhaust brakes protects against engine overpressure
  • Pacbrake exhaust brakes are designed specifically for individual engine applications to maximize performance and reliability. They are not a one size fits all compromise
  • When the brake is deactivated, exhaust flow is unrestricted and won't interfere with power output Patented 90 degree Non-contacting Butterfly Valve is specially engineered to maximise backpressure while preventing seizing
  • The brakes use industry exclusive Arcor nitride coating on housing and components which increases resistance to wear and corrosion while strengthening the exhaust brake and adding lubricity
  • Precision machined surfaces on the exhaust brake eliminate the need for troublesome gaskets and risk of leakage
  • The brakes have hard anodized aluminum and stainless steel body and shaft with high performance seals
  • Maintenance is as simple as using the exhaust brake on a regular basis and periodically applying Superlube (Pacbrake's multi-purpose heat resistant lubricant which helps to prevent rust and corrosion)
  • Withstands extremely high exhaust temperatures
  • Compliant with latest emission regulations
  • Severe duty & military approved
PRXB BenefiTs
  • Delivers the strongest braking horsepower, greatest speed reductions & shortest stopping distances possible without the use of service brakes
  • Maintains optimum retarding performance by maximizing the exhaust backpressure throughout the entire operating RPM range
  • Delivers maximum exhaust pressure (braking) as low as 1200 RPM through to the maximum allowable engine RPM
  • Provides increased performance and peace of mind with technology that protects the engine from the potential of overpressure
Kit Contents

Every PRXB Automotive 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
    - 1/2 Gal Air Tank
    - 25ft Coiled Air Hose
    - Air Accessories & Fittings Kit

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