R5O-4IA 5" OD to 4" ID Exhaust Reducer Aluminized Pipe

It transitions the exhaust connection from a larger pipe to a smaller one to help maintain smooth flow and reduce turbulence. As a 5 inch OD to 4 inch ID reducer, it’s commonly used when adapting mismatched exhaust components during repairs or modifications. The aluminized exhaust reducer pipe construction helps provide durability in typical truck exhaust conditions.

Measure the outside diameter (OD) of the larger pipe and the inside diameter (ID) of the smaller receiving side you’re adapting to. This part is an exhaust pipe reducer 5 to 4, meaning it’s intended to mate a 5-inch OD side to a 4-inch ID side. If your system uses different measurement points (both OD or both ID), verify your pipe ends and clamps match the reducer style before installation.

Yes, it’s designed for truck applications where a step-down is needed to connect different exhaust pipe sizes. Grand Rock R5O-4IA can be installed as part of an exhaust repair or an exhaust modification as long as the 5-inch OD and 4-inch ID interfaces match your tubing ends. For best results, use appropriate exhaust clamps or welding methods and ensure the joint is sealed to prevent leaks.