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Old 06-12-2013, 12:37 PM   #17 (permalink)
synolimit
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Quote:
Originally Posted by Chuck33079 View Post
My first choice would be to send them back and get an unbroken set. Hollowing them out would still be better than stock cats. I'm not sure what the size of the cat chamber on those pipes are, so you may be right. My guess would be that you'd never know- the difference would be small enough to be within the range of dyno variance.
I'd say 4". They might change too going small, to big, back to small. Who knows though.
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Last edited by synolimit; 06-13-2013 at 08:23 PM.
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