Showing 1 to 3 of 3 Products




- 2006 - 2007 GMC Classic 6.6L Duramax 32 Valve Engine - Allison 1000 Series Automatic Transmission without optional 2nd alternator.
- 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.
- Upgrade any standard exhaust brake to a PRXB for an improved design and a longer lasting brake with significantly increased performance.

- 2001 - 2005 GMC 6.6L Duramax 32 Valve Engine - Allison 1000 Series Automatic Transmission without optional 2nd alternator
- 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.
- Upgrade any standard exhaust brake to a PRXB for an improved design and a longer lasting brake with significantly increased performance.

- 2001 - 2006 Chevrolet Silverado / GMC Sierra 1500 HD (2WD/4WD)





- 2006 - 2007 GMC Classic 6.6L Duramax 32 Valve Engine - Allison 1000 Series Automatic Transmission without optional 2nd alternator.
- 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.
- Upgrade any standard exhaust brake to a PRXB for an improved design and a longer lasting brake with significantly increased performance.
- 2001 - 2005 GMC 6.6L Duramax 32 Valve Engine - Allison 1000 Series Automatic Transmission without optional 2nd alternator
- 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.
- Upgrade any standard exhaust brake to a PRXB for an improved design and a longer lasting brake with significantly increased performance.
- 2001 - 2006 Chevrolet Silverado / GMC Sierra 1500 HD (2WD/4WD)





Showing 1 to 3 of 3 Products