This summer i plan on dropping a new turbo into my car, and i am having a tough decision determining which one i want to put in. I have it narrowed down between the TD05 18G, which has moderate power but a relativly low spool time, the TD06 18g, which has a bit more power but less spool time, or the TD06 20g, which makes great power, with a low spool time. The thing is, i cant decide weather i want to keep my stock tranny. if i were to get the 18g, i would keep my stock tranny, but if i moved up to the 20g, id get new ppg gear set. i have a 07 wrx wagon that i am trying to make a sleeper. What do you guys think?