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2.5" Sentinel Exhaust Brake (Heavy Duty)

The Heavy Duty - 2.5" Sentinel Exhaust Brake adds powerful, fully automated exhaust braking to diesel vehicles equipped with a 2.5-inch exhaust system, helping reduce brake fade, protect service brakes, and maintain safer downhill speeds when towing or hauling. With the ability to generate braking power up to 80% of your engine’s maximum output, the Sentinel Exhaust Brake delivers strong, consistent exhaust braking performance. The system is fully automated, opening and closing seamlessly in sync with throttle input to provide smooth, predictable engine braking without constant driver input. Installation is quick and straightforward—often completed in under an hour—and every system is backed by a lifetime warranty. Sentinel requires no ECM or TCM programming, no air compressor, and no special equipment. It operates using a durable, gear-reduced electric motor, making it a reliable exhaust braking solution for a wide range of diesel applications.

Categories: SHOP BY SIZE, 2.5" Exhaust Pipe
SKU: BM4250HD

Select Your Specific Vehicle

$1,650.00


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Description


Heavy Duty 2.5" Sentinel Exhaust Brake – Product Overview

Electric inline exhaust brake designed for diesel vehicles with 2.5-inch exhaust piping. Sentinel delivers up to 80% engine braking capability to improve downhill safety, reduce brake fade, and protect service brakes. Fully automated, easy to install, no air systems or programming required, and backed by a lifetime warranty.

Designed for diesel vehicles with a performance turbo, upgraded injectors, or used for heavy or commercial towing. 

  • 2.5" electric inline exhaust brake
  • Fully automated operation with throttle input
  • No air system required
  • No ECM or TCM programming required
  • Durable gear-reduced electric motor
  • Simple installation with basic tools
  • Backed by a lifetime warranty

Buy Now – Select  Heavy Duty 2.5" Size!


How to Choose the Correct Size

The Sentinel Exhaust Brake lineup is sized by exhaust pipe diameter.

Choose the Heavy Duty 2.5" Sentinel Exhaust Brake if your exhaust pipe measures 2.5 inches at the installation location. All Sentinel exhaust brakes share the same core features and performance characteristics—the only difference between sizes is the exhaust diameter they are designed to fit.

If you’re unsure of your exhaust size, Bundy Motors can help confirm fitment before ordering.


Performance & Safety Benefits

The Heavy Duty 2.5" Sentinel Exhaust Brake helps:

  • Maintain safer downhill speeds
  • Reduce reliance on service brakes
  • Minimize brake fade caused by overheating
  • Improve control while towing or hauling
  • Increase driver confidence on long grades

By slowing the engine instead of relying solely on wheel brakes, Sentinel provides more consistent and predictable braking under load.


Ideal Applications

The Heavy Duty2.5" Sentinel Exhaust Brake is commonly used on:

  • Diesel pickup trucks
  • Diesel vans and SUVs
  • Compact and specialty diesel engines
  • Light, commercial and utility vehicles
  • Custom builds with 2.5" exhaust systems

If your diesel vehicle uses a 2.5" exhaust pipe, this Sentinel exhaust brake is likely a perfect fit.


SAFETY

Engine Braking Designed for Safer Descents

Long downhill grades and towing loads can quickly overwhelm service brakes.

The Sentinel Exhaust Brake enhances safety by:

  • Helping manage speed on long descents
  • Reducing brake overheating
  • Supporting consistent braking under load
  • Providing smoother, more controlled deceleration

This results in improved safety and peace of mind when hauling heavy loads.


INSTALLATION

Straightforward Installation — Often Under an Hour

Sentinel is designed for easy installation using basic tools.

Typical installation includes:

  1. Installing the exhaust brake inline
  2. Routing wiring
  3. Connecting the controller

The automated system ensures consistent exhaust braking without requiring constant driver input.


DURABILITY + WARRANTY

Built for Real Diesel Use — Backed for Life

Sentinel Exhaust Brakes are engineered to handle:

  • High exhaust temperatures
  • Repeated braking cycles
  • Towing and hauling loads
  • Real-world diesel use

Every Sentinel Exhaust Brake is backed by a lifetime warranty.


FAQ —  Heavy Duty 2.5" Sentinel Exhaust Brake

Is this the same exhaust brake as larger Sentinel sizes?
Yes. All Sentinel exhaust brakes share the same core design, features, and automation. The only difference is exhaust diameter or the Heavy Duty. 

Do I need an air system or programming?
No. Sentinel is fully electric and requires no ECM or TCM programming.

Is this suitable for towing?
Yes. When matched correctly to your exhaust system, the 2.5" Sentinel Exhaust Brake provides excellent braking performance for towing and hauling.

What if I’m not sure which size I need?
Bundy Motors can help confirm exhaust size and recommend the correct Sentinel exhaust brake.


Upgrade Your Diesel with the Sentinel Exhaust Brake

Add dependable, fully automated exhaust braking to your diesel vehicle and protect your service brakes on every downhill grade.

Buy Now!

Questions before ordering?
📞 435-704-2272
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