I do not think that the cat is the make or break point for the backpressure level in your exhaust. Keep piping diameter at the correct size for your app and go with a high flow cat in that same size. Probably 2.25" or no larger than 2.5".
Doesn't really matter...hell, just go to an exhaust shop and they'll have all the cats. you could ever want in every size you can imagine. Cost for cutting and welding in a new one would probably cost you around $30.dabigbbadwoof said:ok so what brand cat do you reccomend my piping is 2.25
what is the cost for cutting and welding the cat in?