MFactory Carbon Fiber drive shaft is on and there is a noticeable difference from stock. It's especially noticeable at slower speeds as you don't have to stay on the throttle as much to keep rolling. My KW DDC coil overs aren't set up properly on my car, I think once the Clubsports are on the CF drive shaft difference will be more prevalent (suspension is super soft right now). I also added some 3mm spacers all around and had MRF lower the car a tiny bit more.
Also got to check out one of my favorite spec'd E92's while I was there:
