aFe Direct Fit Catalytic Converter 05-08 BMW Z4 M Roadster/Coupe (E85/E86) L6 3.2L (S54)Replace your faulty catalytic converter with aFe POWER's direct fit catalytic converter. 100% hand MIG welded, mandrel bent, 409 stainless steel tubing for strength and durability, this affordable, direct fit converter is EPA compliant and utilizes factory mounting locations, OE style flanges and includes quality hardware for a quick, bolt on install. This direct fit catalytic converter replacement is constructed of 100% hand MIG welded, mandrel bent,