I still haven't pushed this car into the Cal Sag, although I have considered it a few times. I ran into one minor setback, but I'm moving forward again. I had to cut out and redo the mid plate mounting tabs because I didn't like the driveline angle when I put the transmission in for mock up.
Changing the angle of the engine moved the turbos slightly and changed the angle of the down pipes a little bit. The driver's side down pipe is fine. I'll have to modify the passenger side downpipe a little bit, but shouldn't be much of an issue.
Last night I started making the driver's side exhaust. I'm just running the exhaust straight back into a pair of Borla XR1s in the stock location and dumping it before the rear axle. As much as I would like to run tailpipes, there's no way I can fit 3.5" over axle pipes with the anti roll bar I have. For the sake of time and ease of assembly/disassembly, I'm not going to make an X or H pipe. If it sounds like crap, I can later figure out a way to merge the mid pipes. From the little research I've done there's no benefit to a crossover mid pipe after twin turbos, other than it may improve sound.