The polyurethane hump coupling is designed to connect to a 4-1/8" ID and is 3" long. The polyurethane construction is designed to meet modern elevated engine compartment temperatures with a reaction injection molded (RIM) polyurethane configuration. Standard stainless steel worm-gear clamps provide tight connections, durability and corrosion resistance for industrial, commercial, truck, off-road and racing applications.
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