The upper one looks obviously longer between the reducer and the flange. Maybe it's so there is more room to bolt them up? . Crack out the welder, stainless is pretty easy to weld.
Might have to go to a full twin system, no x pipe, which I don't want to do. I'd have a go at cutting and extending, but my wielding skills are non existent.
Geoff... I would be shortening the longer one, not extending the other. Mark up on the longer one where the flange needs to come back to... and take it somewhere to be re-welded. It wouldn't cost much.
Wow Those cats are fairly well lined up but the flanges are way off. Looks a nice error in the construction.
An error done on purpose, ams+sz dont mix faaaaaaaaaarrrrrrrrrrrrrrk, I should have thought off that before I brought the mids, because that is the difference! I did ask before I brought the mids, if they would mate with the sz dumps, the answer was yes, no problem! Bullshit!!!
Once it's finally complete, you'll be too scared to drive it... as it might get dirty. May as well park it in the living room, and set the dinning room chairs around it
better make friends with a glazier and get a trophy room ready then. some people have cricket bats and footballs in cases never seen a mint 300zx in one before, you truely will be unique.