TTI makes down pipes @ 2-1/2 inches for the exhaust manifolds to connect to there exhaust system. You will need the numbers on the exhaust manifold so they can be sure to get the angles right since exhaust manifold design will have the outlets at various angles and locations.
Rumblefish360, thanks for that info. I know Pypes is looking for a volunteer to have downpipes made for the A-Body. Question- how many variations are there for A-Body manifolds?
