There's just no way around the fact that a good dif is both expensive and valuable. I'm of the opinion that gears and traction are cheaper time found on the track than just about any other improvement, though - particularly a 'built' engine.

I'm a huge fan of clutch-type diffs and have ordered one of the Kaaz-built units for the Golf, from our friends at Bildon. I've also heard good things from people I trust about the OPM part.

A Quaife unit WILL spin an unloaded tire. If I were building a street car, I'd go that route but I want something a tad more positive for racing use.

K