Dorman 904-7639 Exhaust Brake Actuator for Heavy Duty Trucks

The Dorman 904-7639 Exhaust Brake Actuator is a direct-fit replacement component engineered for heavy-duty diesel trucks, including select Kenworth and Peterbilt models. Designed to match the appearance and function of the original equipment actuator, this part restores proper exhaust braking performance without requiring modification or custom fitting.

Exhaust brake actuators play a critical role in engine braking systems by restricting exhaust flow to create back pressure, which helps slow the vehicle using engine compression rather than relying solely on the wheel brakes. This reduces brake heat and wear, improves control on steep grades, and extends the service life of your conventional braking system.

Key Features:

• Direct Replacement: Engineered to match the fit and function of the original actuator on specified applications
• Ideal for Failure Replacement: A reliable solution for actuators that have failed due to collision damage or normal fatigue
• Durable Construction: Made from quality materials for reliable performance and long service life
• Heavy-Duty Application: Designed for use on Class 8 commercial trucks including select Kenworth and Peterbilt platforms
• Dorman HD Solutions Line: Backed by a team of U.S.-based product experts and over a century of automotive aftermarket experience
• Sold Individually: One exhaust brake actuator per package

The Dorman 904-7639 is part of the Dorman HD Solutions lineup, purpose-built for heavy-duty truck applications. It offers a cost-effective alternative to OEM replacement, helping fleet operators and owner-operators get back on the road quickly and confidently.