What to tell the exhaust shop.

cchrishefish said
Dynomax is indicating that this is the turbo muffler for my car, are they wrong?

Thrush® Turbo Muffler - Offset / Offset - P/N: 17696

I assume you mean Thrush, not Dynomax. Haven't tried that one, so can't say for sure. I can say that I have one slant six A body, two small block A bodies, and two big block B bodies, and they ALL have offset inlet, center outlet mufflers.