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Posted

Does any body know the size of the stock exhaust piping? On another note, does anybody know if the stock down pipe from a 3.8 will bolt up to a 3.4 DOHC engine?

Posted

Zeroburn,

 

It's 2" in diameter for the W-Body. (and for most GM's right?)

Nope, Patgizz, you're right... 2.5"

 

As for the downpipe from the 3.8L, that's a good question to ask RedZMonte of M and S Production. RedZ, got some info?

 

- RedFox340

Posted

The reason i ask is because i found some nice stainless steel down pipes that are for the 3.8, but if they fit or are the same thing for the 3.4 DOHC engine and others that would be great.

Posted

the stock exhaust from my 91 3.4 cutlass was 2 1/2" and stock my 94 lumina 3.1 was 2 1/4"

 

i can tell you for sure the 3.1/2.8 downpipe is different than the DOHC one. cant say for the 3100/3400/3800

Posted

yeah my 3.1L stock size was 2 1/4". I wish I knew about the down pipe question

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