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The Spectre reducer coupler joins a 4.00-inch outside diameter component to a 3.5-inch outside diameter intake tube. Made from black PVC and three inches long, it ships with two stainless steel worm-gear hose clamps for secure connection. It’s intended for non-pressurized intake plumbing and is not suitable for turbocharged or supercharged boost outlets.
Spectre Coupler/Reducer 4in. to 3.5in. (PVC) - Black
