The high temperature injected molded reinforced silicone hump coupler is designed to connect to a 3-1/2" ID tube. The coupling is 3" long with a 30 degree bend. Standard stainless steel worm-gear #056 clamps provides tight connections, durability and is corrosion resistance for industrial, commercial, truck, off-road and racing applications. NOTE: Not suitable for use with forced induction applications.