• Pacbrake's PRXB exhaust brake delivers the strongest braking horsepower, greatest speed reductions & shortest stopping distances possible without the use of service brakes.
• Providing 50 percent more braking power at lower RPM's, PRXB gives you the best holdback in the 1400-1800 RPM range (where you typically drive).
  
• The spring controlled pressure regulated mechanism on the exhaust brakes protects against engine overpressure.
  
• The brakes use industry exclusive Arcor nitride coating on housing and components which increases resistance to wear and corrosion.
  
• Severe duty & military approved.

Get the highest braking power to lowest price ratio available on the market with PRXB Exhaust Brakes by Pacbrake. 

We are proud suppliers of exhaust brake systems for use in the US Army's fleet of Stryker Wheeled Vehicles designed and built by General Dynamics Land Systems. 

Check out Pacbrake's Direct Mount 4 inch PRXB High Performance Exhaust Brake Kit for Dodge RAM 2003-2004.5 Cummins 5.9L ISB 24 Valve with Standard Transmission (Built upto Jan 4, 2004).

• Provides 50 percent More Braking Power at Lower RPM's. PRXB gives you the best holdback in the 1400-1800 RPM range (where you typically drive).
  
• The spring controlled pressure regulated mechanism on the exhaust brakes protects against engine overpressure.
  
• 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.

Every PRXB Automotive Kit comes with everything required for a complete installation. PRXB Exhaust Brake, Controller (when required for application) and Pacbrake Onboard Air Kit.

Includes:

• 25 Foot Coiled Air Hose
  
• Air Accessories and Fittings Kit
• Pacbrake's Direct Mount 4 inch PRXB High Performance Exhaust Brake Kit
• Air Actuated-For vehicles with Existing Onboard Air

Specifications:

• Application: Dodge RAM 2003-2004.5 Cummins 5.9L ISB 24 Valve
• Size: 4.0 Inch
• Hose Length: 25 Foot
• Hose Type: Coiled
• Capacity: .5 Gallon
• Transmission: Standard Transmission
• Mount: Direct Mount
• Valve: 24 Valve
• Engine Manufacturer: Cummins
• Engine Years: 2003-2004.5
• Liters: 5.9 Liter

Vehicle Application:

• 2003 - 2004.5 Dodge RAM Cummins 5.9L ISB 24 Valve with Standard Transmission (Built up to Jan 4, 2004)