Well, it's come to my attention that my exhaust and cat will need replacing soon. After seeing the prices for the stock kit, I was a bit overwhelmed.
Is there another option, prefereably cheaper

, to swap out my cat and exhaust with some aftermarket ones ? I'm not sure where to look, as this is my first time looking into an aftermarket exhaust, ect..
And would it have to be FOR my 9-3, or could I mod another exhaust (like a DC) to fit ?
BTW, it's for a 99' 9-3 SE 2.0 Turbo Convertible.
Thanks guys, all help is appreciated !