My car has recently started a bad sputter with a little more than normal acceleration, and a few guys have told me it's a bad Cat (and a quick trip to AutoZone confirmed it's bad). I'm in a state without an emissions check, so I want to replace the cat with a test pipe for two reasons, more HP, and it's cheaper than a high flow cat. So, the question is, which test pipe should I buy, and what known issues will I have, and how to avoid them (I read something about O2 sensors and codes and stuff, but I need a simplified answer). I already have a NeuSpeed 2.5 inch cat back exhaust, so I need to make sure it will fit.

I'm new to the sight, and very new to tuning, so any help would be great! Thanks...

Brad

 

just make sure your test pipe has a 2.5inch flange where your cat-back system starts and you should be good

 

Sounds easy enough, but finding one online that states the size is turning out to be a little more difficult than I thought. Anyone know of a good website?