LT1 Based Engine Tech 1993-1997 LT1/LT4 Engine Related

stock exhaust pipe size??

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Old Mar 20, 2003 | 11:17 PM
  #1  
larson_lars64's Avatar
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From: south dakota
stock exhaust pipe size??

I was just wondering what size my stock exhaust pipes on my 93 z28 are going from the muffler to the rear. Are they 2.5" or 2.25"?
Old Mar 20, 2003 | 11:29 PM
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someone out there must know, anyone??
Old Mar 20, 2003 | 11:40 PM
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neil350's Avatar
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2.75
Old Mar 20, 2003 | 11:44 PM
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the pipe coming from the cat to the muffler i know is 2.75. I'm wondering about the dual pipes going from the muffler to the tips.
Old Mar 20, 2003 | 11:58 PM
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I never measured the back pipes to the tips at home, but measured the cat to muffler pipe. Maybe it is different towards the back of the car, but right under the passenger i got a 3" outside diameter, which would probably make the pipe a 2.75" diameter there.
Old Mar 21, 2003 | 10:36 PM
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The intermediate pipe is 2 3/4, and the part where it enters the muffler is 2 1/2, the tail pipes are 2 1/4.
Old Mar 21, 2003 | 11:09 PM
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I think that is correct $hawn, i just had my magnaflow installed and we measured it out to be able those figures.
Old Mar 21, 2003 | 11:38 PM
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Def 2.75
Old Mar 22, 2003 | 01:34 AM
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$hawn is correct. The tailpipes are 2 1/4
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