yeah, you'd have to swap the pre cat back in probably. Even if today's replacement and performance cats probably are better than your stock as far as emissions, its still a rotary.

so that can pretty much kill my idea of running a down pipe or not?

no man



you should start a new thread for down pipes and emissions so the turbo guys can respond

Does anyone just keep their precat assembly and swap it back and forth for emmisions? Or do the flanges/hangers etc. get pretty messed up when you remove it? Seems as simple as the racers running test pipes, 4 bolts, 2 gaskets and you're street legal again...

ok well my father isn't gonna like the idea of swaping each time i gotta take emisions