Hi all,i'm looking to fit a 6 speed box into my GC8 rally car,but i'm not sure about final drive & gear ratio's for different models.As i understand it UK sti's have a 3.5 cwp & import sti's have a 3.9 cwp,is this correct?Also i have no info on individual gear ratio's.I'm looking for a dccd centre diff type box from a 2.0 litre car as i presume the 2.5 box has longer ratios?Any help would be greatly appreciated,regards timrally

 

This any good to you?transmission chart

Also try david at API impreza, he may have the answers for you. API impreza

 

Thats great,thanks very much,very usefull.Being a rally car i don't want too much top speed,so it looks like a import box is the way to go as they all have 1:1 drop gears rather than the 1.1:1 of the uk cars which equates to a 3.54 rear diff rather than the 3.9 of the imports,cheers timrally.