What does 2.5" exhaust tubing refer to???
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Senior Member
Joined: Mar 2004
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From: Davie, Florida
What does 2.5" exhaust tubing refer to???
I have a quick, maybe stupid question. Does 2.5 inch exhaust refer to the inside diameter of the tubing? Or the outside diameter of the tubing? And what size is the tubing on our stock cat pipes? Thanks a lot.
