If you are serious about the exhaust, I believe a friend of mine would donate his MKIII for mock up-
Just give Ryan a call and we can get something worked out.
Do you make a 4" MKIV Downpipe that would fit and stock TT style Exhaust Flange and have the usual 2 bolt flange at the other end to mate up to an HKS Super Dragger? I would prefer to have one with a flex joint and it would need the 2nd O2 Bung for my 97 OBDII.