Looking online, the CATs I see have both the inlet and outlet flanges centered on the CAT. On my CAT, which has been gutted by a previous owner, the front flange is offset to the right side, I presume this is for the connector pipe to clear the gear shift mechanism. Is this an oddball CAT?
Also, on other CATs I found online the flange studs seem to be parallel with the horizontal center of the CAT. On mine they are about 15-20 degrees off horizontal.
Seems this would make replacing the CAT with a DECAT pipe, which is dead straight, problematic, since my middle box would not likely be centered in the exhaust tunnel.
PS: Any other old timers like me that remember what the round red tool to the right of the exhaust is, came in handy on this job,
Edited by gdcarpenter, 17 May 2020 - 04:51 PM.