It's pretty easy to make a make a catless downpipe that makes power.  It's much harder to make a downpipe with a catalytic converter yet...

TurboXS RFL Catback Exhaust for the Cobalt SS TC is just that "Really Fuckin' Loud".  As with anything we put our "RFL" tag on, this part...

TurboXS RFL Catback Exhaust for the Cobalt SS TC is just that "Really Fuckin' Loud".  As with anything we put our "RFL" tag on, this part...