BD Diesel 1028040 Exhaust Brake for 4 inch Exhaust | Universal

• Provides up to 150 retarding horsepower throughout the engine's RPM range
• BD's exclusive Variable Orifice Technology
• Adjustable pressure regulation
• Pneumatic spring loaded cylinder
• BD's solid, offset butterfly
• Rugged, cast-iron housings
• BD's exclusive alum bronze bushing
• Piston ring-seals
• Stainless steel butterfly shaft
• Proven to stand-up under the harsh, high heat conditions of the exhaust environment
• All mounting hardware provided
• There's a reason why the BD Brake is the most widely-recognized diesel exhaust brake in the industry: It's the best! Compare it to the competition, and you'll see why.

Add Confidence And Control To Every Haul

When you are pulling a trailer or running with a heavy load, slowing down smoothly can feel just as important as getting moving in the first place. The BD Diesel 1028040 Exhaust Brake gives you that extra layer of control by delivering up to 150 retarding horsepower across the engine’s RPM range. Instead of relying entirely on your service brakes, this system uses back pressure to help hold your speed on steep grades and during long descents. That means less stress on your factory brakes, reduced heat buildup, and fewer costly replacements over time. It is especially valuable when towing in mountainous terrain where conventional brakes alone are often pushed to their limit. Installation is straightforward with the included hardware, and the universal 4-inch fit ensures it works on a wide variety of diesel trucks. With BD’s proven track record in braking systems, you can head down the road knowing your truck has the stopping power it needs.

Engineered Strength That Delivers Reliable Exhaust Braking

The BD Diesel 1028040 is more than just an add-on, it is a carefully engineered system built to perform under extreme heat and stress. At the heart of this brake is BD’s exclusive Variable Orifice Technology, a design that regulates back pressure consistently throughout the RPM range. The pneumatic spring-loaded cylinder and offset butterfly work together to create smooth and dependable braking force. A rugged cast-iron housing protects the unit from high exhaust temperatures, while an aluminum bronze bushing and stainless steel butterfly shaft extend its service life. To prevent leaks and maintain efficiency, piston ring seals are integrated into the design. The brake is universal for 4-inch exhaust systems and includes all necessary mounting hardware for a clean installation. Because it does not require an EO number, it is legal for sale and use in all 50 states. For trucks equipped with aftermarket non-VGT turbos, this unit offers a proven way to add safe, effective braking performance.

• Universal

• Brake controls connect to throttle pedal with Accelerator Pedal Position Sensor (APPS). Vehicles without APPS will require 1300420 micro switch and custom bracket will have to be made.
• Exhaust Back Pressure test gauge kit 1030050 suggested for the set-up of exhaust brakes
• May not work with engines that have OEM Variable Vane (VGT) turbos such as Cummins ISX. Will work with aftermarket non-VGT turbos.