4: PRSB High Performance Exhaust Brake Kit (Air Actuated) In-Line Mount comes with Air Tank/Hose and Accessory Kit - 2006-2007 Classic 6.6L with optional 2nd alternator - Automatic Trans
4" PRSB High Performance Exhaust Brake Kit (Air Actuated) In-Line Mount comes with Air Tank/Hose and Accessory Kit - 2006-2007 Classic 6.6L with optional 2nd alternator - Automatic Transmission
PRXB Exhaust 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. Read what our customers have to say...
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.
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.
PRXB Exhaust Brake Kits starting at $1250
PRXB Exhaust Brakes: Mechanics
With over a quarter of a million exhaust brakes manufactured and sold, Pacbrake has mastered quality product development. Being home to the only exhaust brake on the market with a true variable orifice, remarkable constant backpressure and strongest braking horsepower, Pacbrake has revolutionized modern day exhaust braking with its patented design of the PRXB.
WHAT’S SO SPECIAL ABOUT THE PRXB?
In order to have consistent and effective braking over the entire RPM range, it is important (and necessary) to maintain constant backpressure. To achieve this, Pacbrake’s patented design has incorporated an additional waste gate on the butterfly valve to regulate the amount of exhaust flow that is being passed through. The flow is controlled by a spring-loaded arm, whose pressure rating and location are key factors in the functionality of the PRXB. Located outside of the housing and away from the heat, the spring is able to maintain its strength and durability for years of proper and precise braking performance.
PUTTING IT ALL TOGETHER
CREATING & MAINTAINING BACKPRESSURE
Backpressure is created by exhaust flow entering the housing, hitting the closed butterfly valve and being forced back out in the direction it came. It is maintained by the pressure-controlled spring that is located on the outside of the exhaust brake housing.
PREMIUM BRAKING PERFORMANCE
As the engine’s RPM increase, the spring compresses and the arm moves away from the butterfly valve, therefore releasing more exhaust flow through the orifice. As the RPMs decrease, the spring releases and the arm applies pressure back onto the plate, covering the hole, and ultimately releasing a smaller amount of exhaust flow.
There is less than a 10% change in backpressure over the entire RPM range on the PRXB
PACBRAKE'S PRXB
PRXB Exhaust Brakes: Our Kits
Everything Is Included
There are a number of components required to operate an exhaust brake, but we conveniently include everything you need in our exhaust brake kits. Check out the information below to learn what is included in our kits, which start as low as $1250.
AIR COMPRESSOR, TANK & CURLY HOSE
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 ½ 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 including:
Filling tires and checking air pressure
Inflating air mattresses, footballs, beach toys etc.
Blowing air (for cleaning, dusting, quick removal of debris)
EXHAUST BRAKE & TRANSMISSION CONTROLLERS
Most of our exhaust brake kits come with a controller. This small device is responsible for engaging the vehicle’s exhaust brake by monitoring the following settings: engine speed, vehicle speed and throttle position. It reads the vehicle’s data and analyzes the results to decide what actions must be taken. If your brake kit didn’t come with a controller kit it simply means your vehicle doesn’t need it.
Pacbrake has two types of controllers, one that is strictly an exhaust brake controller as outlined above, and the other is combination brake controller and transmission controller. This dual control is designed for vehicles with automatic transmissions to improve the functionality of the exhaust brake. It does this by taking control of the torque converter solenoid to modulate the pressure that the torque converter sees. Essentially, it forces the clutch to disengage in the torque converter and puts the vehicle into full lock-up, resulting in less slippage and smoother exhaust brake activation.
EXHAUST BRAKE ADAPTERS
When it comes to installing an exhaust brake on your diesel vehicle there are two different mounting configurations. Shown below is an example of the most typical exhaust brake installation - the inline mount. For this type of install adapters are required to seal the airflow from the exhaust brake to the exhaust pipe. They are mounted on either side of the brake and clamped into place.
Dodge 2003 and newer vehicles are the exceptions, as they 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.
Pacbrake’s exhaust brake adapters are stainless steel and have machined flanges so that they are perfectly matched when connected to the exhaust brake housing. This, as well as the stainless steel V-Clamps, ensures that there is a perfect airtight seal made between all exhaust brake joints.
CAUTION: All vehicles with exhaust system upgrades will be required to use an adapter that fits precisely with the current exhaust pipe size and brake. Please inform Peak Diesel Performance about any exhaust system upgrades when ordering an exhaust brake
