The high temperature 3-Ply reinforced silicone hump coupler is designed to connect to a 6-1/4"ID tube and is 2-3/4" long. Standard stainless steel worm-gear #104 clamps provides tight connections, durability and is corrosion resistance for industrial, commercial, truck, off-road and racing applications. NOTE: Not for use on pressurized side of supercharged or turbocharged applications.