Go Quaife..... Had mine in now for a couple of years, and now with 428bhp, it all makes sence.

To be honest, they're both damned good diffs, and alot more reliable than the original. Of course, the quaife diff uses the original cosworth crown wheel and pinion, which is no problem as it is the planet gears that are the weak point in the standard diff.

Quaife Diff in Ford Casing.