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Diameter of the stock dual exhaust?

AJMBLAZER

Better to be lucky than good.
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Can someone tell me the inside and/or outside diameter of the stock dual exhaust on a 80's GM diesel or a CUCV if they're different?
 
My '86 M1009 CUCV Blazer is 1 7/8" ID and 2 1/4" OD. I'm almost positive the M1009 CUCV Pickup is the same. I can verify tomorrow at work.
 
My '90 with the 6.2 had 2.25" pipes from the factory.

For the post about the pipes having 1 7/8" ID and 2 1/4" OD....man, that's some super beefy exhaust tubing! That's like 3/16" wall...heavier than any rollcage tubing you normally use.
 
Mine seems to be 2.5" ID inlet and 2.25" ID outlet at the muffler. I found a Cherry Bomb application that should fit it exactly perfect.
 
I wouldn't recomend any sort of "Glass pack" muffler...it'll eventually clog with soot.

I'd use a chambered muffler, or something diesel specific.

Rene
 
I guess I don't understand how a chambered muffler wouldn't clog with soot either...other than more interior space to fill?

I like Magnaflows but the $80 each puts me off. Still saving the pennies for one for the wife's truck.
 
AJMBLAZER said:
I guess I don't understand how a chambered muffler wouldn't clog with soot either...other than more interior space to fill?

I like Magnaflows but the $80 each puts me off. Still saving the pennies for one for the wife's truck.
The glasspacks clog very easy, the chambered mufflers will always have enough room to flow, a film of soot on the walls will not stop the flow, but soot in fiberglass will.:o
Stick with chambered, you'll end up paying more with glass packs in no time.
:D
 
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