you could lol. but it'd be hella loud!! but then again, if i could i might do jus that. there are time where i wish my twice pipes were louder.
but the cat is VERY restricitve. i actually dont have one at present...passing the smog is going to be an issue i'm going to have to deal with
maybe get a high flo cat and then if you want to, do jus the straight pipe out, no muffler