SPD Performance Cat-Back Stage 2 Performance 304SS Resonator The stage 2 resonator will reduce the exhaust sound level about as much as the OEM resonator does, but it will flow better because it’s a 3″ versus the factory 2.75″. 3″ diameter tubing 304 stainless steel construction For use with SPD cat-backs or custom 3″ cat-backs Will not work with stock mufflers without modifications
