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Shout out and big thanks to @Andyman for all of the help! This is a great community.

Andyman,

Can you expand on how exactly you used the DEI? I'm not familiar with DEI but see that it is a wrap. Did you wrap the entire flex pipe in it, between the clamps? Or did you wrap the...

Yes, ordered from O'Reilly and it has already shipped.

I've had it out to the sand dunes recently. It climbs like crazy and is a blast. There's nothing like it out there, and I get stopped all the...

Thanks, that's helpful info. I measured the two in stock at the local store as

1 1/2" ID = 5 1/4" OD
1 3/4" ID = 6" OD
So by default, confirms that yours is 1 5/8" ID, since it falls in the...

You got me! We do need to connect...Howie mentioned you.

Oddly, AutoZone had 1 1/2", 1 3/4", 1 7/8" and 2" -- but no 1 5/8." May need to do some more searching if that's the size.
Yes, if you...

1985 500 Super Chief
Can anyone tell me the inner diameter size of the flex exhaust pipe that runs from manifold to body outlet? I'm led to believe it may be 1 1/2" or possibly 1 5/8" but that size...