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Old 11-30-2018, 11:07 PM   #119
SuperTom
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Quote:
Originally Posted by Chuckls View Post
Need to keep a cat conv. for STX autocross class :/

Maybe I can get away with it.
I went with Hooker Headers catted FP with Helmholtz resonator. all the American brand exhausts should be 2.5", Japanese exhaust are 60mm = 2.36" or 70mm
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