I've used a test pipe for 15 years with no problems. A test pipe can be used from just about anywhere, there's not much special about them.
As for exhaust, RJC Racing, Hooker, and Flowmaster still make kits for these cars, but I'm still rocking the ATR single shot I got in 2003, can't believe it is still alive and well. I guess that speaks to ATR's quality or how long my car has been broken!
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