well im gonna get my cutout put on this week and i can't decide where i wanna put it. i want some loud sound but i also want performance. if i put it on before the cat would it mess up the 02 sensor? and if i put it on after the cat what kind of performance would i get out of it. what do u guys think?

 

cats are restrictive but the mufflers are to. If your worried about the O2's put it behind the cat. You still will get good gains. I just yanked out the cats and reprogrammed comp. I'm putting mine in on Wed. Gonna go before the rear end turn up.