What size is stock exhaust?

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Apr 15, 2008 | 07:58 PM

killerbeez

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What size is stock exhaust?

I'm looking just to get a cheap cut out to put on my y pipe or after the y-pipe, what size is the factory exhaust, 3"?
thanks

Apr 16, 2008 | 01:30 PM

thebart455

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From: eastern ky

Quote:

Originally Posted by killerbeez

I'm looking just to get a cheap cut out to put on my y pipe or after the y-pipe, what size is the factory exhaust, 3"?
thanks

lol stock isny no 3" im pretty sure its 2 1/2" y pipe all the way to the muffler

Apr 16, 2008 | 01:37 PM

tylerdj

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From: Amarillo, TX

Pretty sure it's 2 5/8". You should be able to use a 3" cutout just fine though.

Apr 16, 2008 | 01:38 PM

Gary Z

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From: Berkeley, California

The stock intermediate pipe inside diameter of my 02 Z28 is 2.75 inch.

Apr 16, 2008 | 07:30 PM

Fabian

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A 3 inch cutout will NOT work.

I tried a 2.5 on my 02 Z28, too small. So we tried a 3 inch on my cousins 01 SS, too big.

Everyone says a 3 inch is where its at, no dice. 2 3/4 is the way to go. Learn from my mistakes

Apr 16, 2008 | 07:47 PM

02silvaZ

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2 3/4" intermediate pipe, 2 1/4" out to the tips

Apr 16, 2008 | 09:28 PM

RedRocketZ28

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Quote:

Originally Posted by Fabian

Wrong. 3 inch works perfect. Had one put on my 95 Z28 and my 99 Z28. Those both having the 2 3/4 in pipe. Had a 3 in put on my SS which has the 3 in exhaust and it worked perfect as well.

3 inch cutout is what you want/need.

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Apr 16, 2008 | 09:51 PM

Pntbll309

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Quote:

Originally Posted by luis_ws6

i had a 3" when i had my cut out.

Me too.

Apr 16, 2008 | 10:55 PM

#10

tylerdj

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From: Amarillo, TX

Quote:

Originally Posted by Fabian

A 3 inch cutout will NOT work.

Wrong. 3" will work just fine.

Apr 18, 2008 | 08:14 AM

#11

Fabian

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I dont see how. I ordered a 3 inch cutout from Thunder Racing for a 2001 SS. Everything on it was stock.

We had to cut the edges to crush them in and it looked like absolute ****. Let me see pics of yours as well as overall diameter measurements .

Maybe your location was different? We installed it on the little spot on the I pipe where the cutout fits in that little groove. Did you guys actually install them yourself or did you have a shop do it? If a shop did it, then yeah they can make it work but the one I did did NOT slip fit. Not even close.