General Description

With the ability to generate braking power up to 80% of your engine's maximum output, it's the most powerful exhaust brake available. The Sentinel Exhaust Brake Systems are fully automated, effortlessly opening and closing in sync with your throttle pedal. Installation is quick and easy, taking less than an hour, and the system is backed by a lifetime warranty. It requires no ECM or TCM programming, and you won't need an air compressor or any special equipment, as it operates using a powerful gear-reduced electric motor. Choose the Sentinel Exhaust Brake System for enhanced safety and peace of mind when hauling heavy loads. Say goodbye to overheating brakes and hello to worry-free driving.

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How Fitment Works

Sentinel universal exhaust brakes are sized by exhaust pipe diameter, not by vehicle make or model.

To select the correct size:

• Measure the outside diameter of your exhaust pipe at the desired installation location

• Choose the matching Sentinel exhaust brake size (2.5", 3", 3.5", 4", 4.5", or 5")

This sizing method allows Sentinel exhaust brakes to be used on a wide range of diesel engines and platforms, including pickups, vans, box trucks, buses, industrial engines, and custom applications.

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Core Features (Same Across All Sentinel Exhaust Brakes)

All Sentinel 2.5"–5" exhaust brakes include the same core features found in vehicle-specific Sentinel systems:

• Electric inline exhaust brake — no air system required

• Fully automated operation, opening and closing with throttle input

• No ECM or TCM programming required

• Durable gear-reduced electric motor

• Simple installation using basic tools

• Compatible with mechanical and electronically controlled diesel engines

• Backed by a lifetime warranty

Sentinel exhaust brakes are designed to operate independently of factory systems, making them well-suited for both stock and modified vehicles.

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Performance & Safety Benefits

Sentinel exhaust brakes help:

• Improve downhill safety and speed control

• Reduce reliance on service brakes

• Minimize brake fade caused by overheating

• Support safer towing and hauling

• Increase driver confidence on long descents

By using engine braking instead of relying solely on wheel brakes, Sentinel helps maintain more consistent and predictable braking performance under load.

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Ideal Applications

The 2.5"–5" Sentinel Exhaust Brakes are commonly used on:

• Diesel pickup trucks

• Commercial trucks and fleet vehicles

• Vans and shuttle buses

• Box trucks and delivery vehicles

• Industrial engines (including Cummins 4BT)

• Custom builds and engine swaps

If your diesel vehicle has a compatible exhaust diameter and sufficient clearance for inline installation, a Sentinel exhaust brake can likely be installed.

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Installation Overview

Installation typically includes:

1. Mounting the exhaust brake inline with the exhaust system

2. Routing wiring

3. Connecting the Sentinel controller

Because Sentinel operates automatically, it provides consistent exhaust braking support without requiring constant driver input.

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Warranty & Durability

Sentinel exhaust brakes are built to withstand:

• High exhaust temperatures

• Heavy towing loads

• Long downhill grades

• Continuous real-world diesel use

Every Sentinel exhaust brake is backed by a lifetime warranty.

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Fitment Support

If you’re unsure which size to choose or need help confirming installation clearance, Bundy Motors is available to assist before or after purchase.