Originally Posted by WillGeorge
This would have been the best option...$
Well mate, I build rally cars and buggies and the trans is the soul of everything. You did the right thing to sell the 6 speed as you using the car for autocross. I assume the 6 speed had a ratio of 3.545 hence a very long gearbox. The 3.9 ratio 6 speed is also good. You need a very close ratio box. What you need is a 5 speed off a Sti RA (Rally version) with a 4.44 final drive. Your top speed will be around 170kph on 15" tyres. This will certainly be magic. However, this will be really bad for open stages.