aFe Magnum FORCE CAI Univ. Silicone Coupling Kit (3.75in. ID to 3.5in. ID) Straight Reducer - Red

The high temperature red 1-Ply reinforced silicone hump coupler is designed to connect to a (3-1/2" x 3-3/4")OD tube and is 3" long. Standard stainless steel worm-gear #056 & #060 clamps provides tight connections, durability, and is corrosion resistant for industrial, commercial, truck, off-road, and racing applications.