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Discussion Starter #1
I have a 2006 spec v and i am slowing modding my car mainly because of college. i was thinking of getting a cat back exhaust and i was thinking of 2 1/2" but my friend thinks i should go with 3". If i cold get someone elses opinion that'd be great thanks.
 

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3" is useless and will actually hurt your performance unless you've got some kind of forced induction. stick with 2.5
 
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