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Thread: stock exhaust size
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04-28-2009, 05:06 PM #1
stock exhaust size
Hey guys, I haven't been able to see my car in a few days so I can't go measure myself. I have been searching the web for days and I can't get a straight answer. Can someone tell me what the size of the inlet and outlets are on a stock muffler? I assume it would be the same size as the I-pipe and tail pipes. I am looking to get a muffler but i want to know exact so that I know if I need lapjoint clamps or butt joint clamps. There are so many mufflers and sizes out there and it would be a huge help. I am looking at magnaflow and hooker cause that seems to be the consensus on the best and and well priced muffler. Thanks folks.
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04-28-2009, 05:35 PM #2
I think magna flow sells a direct fit model. I know Blowmaster does, so you could just look at that to get the sizes
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04-28-2009, 05:43 PM #3
It would vary depending on whether your car came with the optional SLP upgraded exhaust or not.
On a factory GM setup I'm pretty sure the tail pipes would be 2 1/4 inch.
The I-pipe is usually 2 3/4 inch. This may have varied as well from year to year.
On the optional dual/dual or dual/dual with CME you got the 3 inch I-pipe and 2 1/2 inch tail pipes,,,,,just like any other 3 inch aftermarket catback.
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04-28-2009, 05:47 PM #4
I tried both the websites and they will not tell you the muffler size on the catback and none say direct replacement for the mufflers
I checked my window sticker and I didn't see anything about an upgraded exhaust, as far as i know it is just a stock trans am
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04-28-2009, 05:53 PM #5
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04-28-2009, 06:03 PM #6
I couldn't tell you that. you're pretty sure it was 2.75 inlet (i-pipe) and a 2.25 outlet (tailpipe) though. Anyone else?
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