So i have a seller who has a blitz nur spec catback, hks downpipe, testpipe for 450. Good deal i think. Anywho, i looked under my car and what the hell do i find. NO FLANGES. The cat was replaced and welded in. So even if i get something like a high flow cat w/ flanges. The one side of the exhaust pipe won't have a flange to bolt up to the cat. Man this sucks, what do i do?