Hot Rod Forum : Hotrodders Bulletin Board - View Single Post - SBC header tube diameter
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Old 04-01-2013, 09:28 PM
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I use 3 inch mandrel bent exhaust with an X pipe,2 1/4 is a joke.
My primaries start at 1 7/8 and step to 2 inch with 3 inch long collectors,my engine is N.A.
You should make more power than me so you need bigger
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