Spectre's EPDM/TPE couplers, elbows and reducers are available to help you connect different air intake tubes together with ease. We offer multiple length and shape couplers and reducers with 3, 3.5 and 4 inch inside diameter sizes. These couplers are also offered with additional angles to match the direction you want your intake to route. Our EPDM and TPE couplers and reducers are not recommended for turbo-charged and super-charged engines.