I recon the new Quaife unit is pretty close, with a shot peen and super polish it should do the job OK. BUT, It depends on a load of other variables, your clutch for starters, then wheel and tyre sizes, drive shaft weights and joints, how you drive, what you drive on, blah, blah, blah........ even traction control I suppose. If you try to think of all the things that`ll generate a sudden shock and deliver it into to the gearbox, and make an effort to reduce the severity of these shocks, you`ll be doing your box a lot of good. It`s not the bhp/torque figure in it`s self that is all that relevant when the numbers get real big, it`s how much of that power you can convert into drive, cars that wheelspin can get away with crap boxes, ones that can transmit it can`t. So at the end of the day, it`s how much can you transmit and how it`s transmitted.
But then I could be wrong /ubbthreads/images/graemlins/grin.gif