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Old 09-21-2012, 03:33 PM   #4
swansong
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Quote:
Originally Posted by Shempi View Post
What exactly is an ORP?
Off Road Pipe. Replaces the catalytic converter with essentially a straight through (but curvy) pipe. Not exactly legal, but if you don't have emissions testing you should be ok. Another option is a High Flow Cat, or HFC, which costs more, but still gives positive gains over the stock cat. And its legal (in most states/applications)
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