1st Generation Specific (1979-1985) 1979-1985 Discussion including performance modifications and technical support sections

2.5" or 3"

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Old 03-10-05, 07:11 PM
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2.5" or 3"

hey guys

would u guys go for a 2.5" or a 3" exhaust if your motor is streetported and ur fuel system and intake/carb are upgraded?
Old 03-10-05, 08:34 PM
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on a 12A? i would think that 2.5 would be plenty.
Old 03-10-05, 09:03 PM
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2.5" is fine.
I ran a 2.5" system on a streetported 13BT running 14psi of boost and it didnt complain at all.I only upped to 3" because of a later turbo upgrade.For a N/A application 2.5" is plenty.
Old 03-10-05, 09:32 PM
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arrytey then...thanx for the info guys
Old 03-10-05, 09:34 PM
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but 3" would be more jdm...
Old 03-10-05, 09:36 PM
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well wer'e not in the jdm zone now are we
Old 03-10-05, 10:27 PM
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Originally Posted by Sir Rupert Hobo
but 3" would be more jdm...
GTFO!


2.5 is what I have planned for my 12a.
Old 03-10-05, 10:33 PM
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heyhey it's the fat computer dude from the boonies lol that was a dirty picture eh supper




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