Some pics of my rear mounted turbo build for my RX8

[Rearmount 8]

My mass air flow sensor is still in roughly the same position. Coming off the turbo to the intercooler is a 2 1/2" piping into then out of the intercooler. Then it enters the engine bay through the airbox location then stepped to a 3" and then is stepped up to 3.5". The 3.5" section is a straight pipe with no bends about 11" with the MAF sitting right in the middle of it.
Underneath and along the drivers side of the car is a nice little slot that the tubing was able to be tucked up to so it is out of the way and wont get damaged. Doing the tuning is slow going at the moment due to some financial issues so it has been placed on hold for a bit. Sucks for me.

Hopefully this answers your questions. If you have anymore or would like to see something specific let me know.