I can vouch for the St170 turbo, it is my mate Simon's car and the thing is an animal, with it on the old switch it would just bang in but now it is really smooth, it just pulls and pulls and pulls to the limiter now. The car has run in the 11's at Santa pod, on road tyres with an ageing and whining type 9 bolted to the back of it! The spec of the engine is pretty much bang on.
Bookmarks