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LT1-LT4 Modifications 1993-97 Gen II Small Block V8

Exhaust ?????????????

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Old 12-12-2010, 07:59 PM
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Default Exhaust ?????????????
I was wanting to know what the stock exhaust piping is on a 93-97 camaro z28?Ive heard it was 2.5 inch is that true?
Also is there a difference in 3 inch -2.5 performance wise?
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Old 12-12-2010, 08:14 PM
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The stock intermediate pipe (between the cat and the muffler) is 2.75".

And there's a reason most every cat-back is 3"+...power.
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Old 12-12-2010, 08:59 PM
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^^ yup what he said. Stock pipe is 2.75"... 3" will allow for more flow and thus more power
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Old 12-13-2010, 12:06 AM
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Only thing 2.5 inch piping is used for on these cars is tailpipes on some systems and what a lot of people run TDs with
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