I live in Florida and have a 94 Si w/ a 2000 JDM ITR B18C swap. I have just ordered a RSR ex-mag exhaust (The quite one) and intend on a new cat/test pipe. I am running all motor, is a tester pipe really effective vs a nice high flow cat? I know I can get away with anything but, being an environmently concious person I would like to keep a cat (Just not at the expense of HP and TQ). Also, what cat fits this swap? I have a cat from a cavilier with a clamped on extension to make it fit, so I don't have anything to compare it to. Thanks.