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Old 03-24-2003, 01:36 PM
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unless you plan on doin any engine mods i wouldn't go 3 inch,, with a pipe that big your exhaust gases just float around instead of being forced out. my truck has got 2 1/2" strait pipes and before i put the big ol air filter on and openend the hood scoop, it seemed rather sluggish... my suggestion is to run 2 1\2" dual if you don't want to do alot.. and 3" if your gonna put an air intake sys on it... i rebuilt a 78 firebird formula a couple years ago during my grade 8 summer, so if ya got any questions, please ask
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