Thoroughbred Diesel logo - click to goto the home page 
shop by manufacture performance products stock tractor parts stock diesel truck parts
arrow arrow arrow arrow
payment options
shop by diesel
search site
shopping cart
arrow View My Cart
arrow Checkout Now
shop by
DPF Delete Pros logo
Shop for DPF delete kits
arrow Diesel Performance
arrow Stock Truck Parts
arrow Tractor Parts
arrow Exterior Accessories
arrow Interior Accessories
arrow Manufacturer
follow Thoroughbred Diesel on these social media outlets
facebook logo youtube twitter logo
subscribe now to our email list

VP44 injection pump
VP44 injection pumps

Edge Products are in stock and ship promptly
Edge Products

H&S Performance
H&S Performance

Dodge Smarty Tuner
Dodge Smarty Tuner

Pacbrake logo

Pacbrake PRXB Exhaust Brakes

You’re here because you have a need for more braking power. Whether your motivation is fueled by safety or maintenance cost savings, you have found the best alternate supplemental diesel exhaust braking system, next to an engine brake, that guarantees optimum retarding performance through the entire RPM range. Unlike a typical exhaust brake that requires high RPMs to work properly, the patented PRXB (pressure regulated exhaust brake) delivers constant exhaust backpressure (braking) as early as 1200 RPM through to the maximum allowable RPM. No other diesel exhaust brake can claim this!

At 1/2 the price of an engine brake, and virtually maintenance free, Pacbrake's PRXB exhaust brake will save you money. It is ideal for in city driving but most importantly for steep descents. Take your foot off the accelerator, and instantly feel the hold back without touching your service brakes – feel in control!
Pacbrake’s PRXB Exhaust Brake has revolutionized the braking industry. Adapted for a variety of diesel vehicle applications, the PRXB provides the strongest braking horsepower, greatest speed reductions and shortest stopping distances possible without the use of service brakes.

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.

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.

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.

Compare with Engine Brakes

  • Up to 3/4 the power of an engine brake
  • 1/4 the weight and 1/2 the price of an engine brake
Pacbrake Features:
  • 50% more efficient at lower RPM's.
  • MORE RELIABLE. Patented 90 degree non-contacting butterfly valve specifically engineered to prevent sticking.
  • SAFER. Pacbrake's back pressure limiter protects against engine overpressure.
  • LONGER LIFE. Exclusive Arcor Nitride exhaust brake coating helps prevent corrosion and maintains lubricity.
  • Save on brake relines ($1500-$7500 per vehicle) pays for itself
  • Less stress while braking on down slopes
  • Quiet enough to use in the city; and legal
  • Less expensive and less weight than engine brakes
  • Easy VOEM or after market installation
  • Virtually maintenance free
  • FREE SHIPPING at Thoroughbred Diesel
Why is the PRXB™ different from other exhaust brakes?
Pacbrake's PRXB™ offers the best holdback power at lower RPM's GUARANTEED!

The patented PRXB is bER; 50% more efficient at lower RPM's than any standard exhaust brake on the market. This allows the driver to use their exhaust brake in the RPM range where they typically drive most.
Pacbrake's exclusive Arcor Nitride coating helps prevent corrosion, maintain lubricity and minimize brake maintenance making it TOUGHER than the competitors.

The PRXB is SAFER because it is specifically designed within the engine's capabilities, and equipped with a back pressure limiter which regulates the exhaust back pressure to protect against engine overpressure.

The patented 90º non-contacting butterfly valve is MORE RELIABLE as it is engineered to eliminate sticking.
Manufactured under a certified quality system, the Pacbrake ensures peace of mind and a safer ride.

Compare the PRXB with standard exhaust brakes
  • Automatically adjusts for lower RPM's.
  • Almost no need to manually downshift, the PRXB becomes invisible to the driver.
  • Higher mid range retarding power than a standard exhaust brake.
  • Almost constant retarding torque.
  • Up to 1/3 more retarding power than a standard exhaust brake at 1500 RPM.
  • Seamless integration into the engine and transmission ECM's.
  • Exact fit makes for easy upgrade from standard exhaust brakes.
torque comparision chart
Exhaust Brake Manuals
Read More About This Product
Choose your truck below
GM logo
GM Duramax
Exhaust Brake Kits
Dodge grab life by the horns logo
Dodge Cummins
Exhaust Brake Kits
Ford logo
Ford Powerstroke
Exhaust Brake Kits
Buy from a experienced diesel performance and repair company, call us toll free at 866-737-4966, we give free advice.
download the ThoroughbredDiesel.com toolbar for your web browser
Cummins logo
Authorized Dealer
Cummins Parts
Thoroughbred Diesel Performance and Repair Shop
4843 Rockwell rd.
Winchester, KY 40391
Call us: 1-866-737-4966
Email Us:
email us at sales@thoroughbreddiesel.com
camera Pictures of our new Shop
Copyright © 2003-2010 Thoroughbred Diesel All rights reserved.

Merchant Services
Auto Site Directory
Site map
Bookmark and Share
Edge Performance Products | Bosch VP44 fuel injection pumps | Dodge Cummins VP 44 diesel pumps | AFE air filters and intakes | AFE cold air intakes | Diesel exhaust systems for Ford, Dodge, GM | Superchips programmers | MRBP diesel exhaust system | Superchips Flashpaq Tuner | Diesel programmers | 5.9 L Cummins exhaust system | Edge Products for Chevy Duramax diesel | Diesel Blog