Originally Posted by
Luca
If your going for a st170 box then you need to be prepared to spend a fair chunk to get it installed.
Clutch and flywheel set up being one of the expenses along with shafts to suit.
The other option which is slightly cheaper would be Focus RS box but ive not looked at those ratios for a long time.
They key factor is going to be an engine which is knocking out 350+ and loves to rev
costs of the flywheel and clutch are expensive and the whole job is of fitting the 6speed conversion. engine wise i could possibly have my current engine re-spec'd with right turbo and valve gear to possibly get 350bhp but if its not gonna hold together then i can't see the point in wasting a costly build? also is it possible to make the cvh head rev upto 7500rpm or is that the danger point of destruction?