20706121
Exhaust Check Valve
Mack

This exhaust check valve is a crucial component in controlling exhaust flow, preventing backflow that could damage the exhaust system or reduce efficiency. Its one-way operation ensures that gases exit the engine properly while blocking reverse flow, which is essential for maintaining optimal engine performance and emissions compliance. Constructed from heat-resistant materials, it withstands the high temperatures of exhaust gases. Proper functioning of this valve helps reduce emissions and noise, contributing to a cleaner and quieter operation. Regular inspection and replacement are recommended to maintain system integrity. Source One Parts Center supplies this reliable check valve to support your truck’s exhaust system performance.