Dorman 674-6001 Exhaust Flex Bellows Kit 4-Inch Clamp-On Steel Bellow Pipe

Dorman 674-6001 is a heavy-duty exhaust flex bellows kit designed as a direct-fit replacement for the original equipment exhaust pipe. Also commonly referred to as a flex pipe or exhaust bellow, this component is engineered to restore proper exhaust system function in commercial trucks.

Key Features:

• Direct-fit replacement – matches the fit and function of the original equipment exhaust pipe to prevent exhaust leaks and restore lost engine efficiency
• Steel construction – durable steel bellow material built to withstand extreme exhaust temperatures and long-term commercial truck use
• 4.00-inch inlet diameter – designed for 4-inch exhaust system connections with a clamp-on installation method
• 14.00-inch overall length – provides the correct flex span between the engine and after-treatment emissions equipment
• Absorbs displacement, vibration, and thermal expansion – quality-engineered to protect surrounding exhaust components from stress and fatigue
• Complete kit – includes all required hardware for a full clamp-on replacement installation
• Quality tested – has undergone vehicle fitment and material testing to ensure proper fit and performance
• Engineered in North America – designed and manufactured to meet the demands of heavy-duty commercial applications

This exhaust flex bellow kit serves as a critical flex point in the exhaust system, connecting the engine side to after-treatment emissions equipment while preventing exhaust leaks that can rob the engine of power and efficiency. The clamp-on design simplifies installation and eliminates the need for cutting or welding.