Diamond Eye ADAPTER 3.5in ID-4in OD SS

This exhaust adapter from Diamond Eye Performance is made from stainless steel, giving it good resistance to rust and corrosion, which is important for exhaust components. It's designed to transition from a 3.5-inch inside diameter pipe to a 4-inch outside diameter pipe. This is a common need when you're changing out mufflers or exhaust tips and the inlet or outlet sizes don't quite match up.

Using a well-built adapter like this ensures a solid connection between your exhaust pipes. Stainless steel is a practical choice here because it holds up well to the heat and moisture found in exhaust systems. It's a straightforward piece that helps you get your exhaust system fitted correctly without needing to do custom fabrication for a simple size change.