Well first night at the track didn't go so well. It was my first time with my new turbo setup, trans and USED r160 with a 3.90 gear. Launched the car at 5500, back end came out a little, shifted to second and BOOM. Broke the rear diff ;-/. new one, meaning r180 this time, is ordered already. Also, I already have an Sti drive shaft curtesy of my friend who has one laying around. All that's left is to figure out axles. I have a Wrx so I need axles that fit an r180 yet 05 Wrx hubs.