just wondering how big it is so I know how big of a cut-out to order....Im pretty sure its 2.75...it only goes to 3" right before the S pipe...
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I-pipe size for Edel brock exhaust....
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The main section in the I-pipe is 2.5" ... it increases to 3" before the S-pipe, and has a 2-inch, 2.25" section just after the cat.2002 Firebird <br />Mods: Whisper CAI and Lid, K&N, Edelbrock Cat-Back, Hurst Billet Plus Shifter w/Lou\'s Short Stick, BMR STB, 32mm front sway bar w/polygraphite bushings and end links, PHB polygraphite bushings, HPP3 tuned
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