Os Giken Crossmission Gearset

[Faid]

Ok guys i have my car recently built to 600AWHP spec, but i dont think the stock gearbox will hold up so im rebuiliding my gearbox completly with the OS Giken Crossmission gearset, plus evry cam in the box is going to be raplaced with new ones and all fluids will be changed using castrol synthetic fluids. and i want to change all the diffs on the car, for the rear i got the NISMO GT diff and for the front im thinking of getting a cusco 1 way. i would like your input on my setup regarding the OS giken crossmission gearset, and to what extend i can abuse this gearset (read: how much power can this gearset take)

[Snowman]

Leewah's GTR had 604awkw's (800AWHP) and used the OS gearset and it never broke.

Just about everything else broke - but the gearset is still good.

Ben from Racepace also use one in his 500awkw track car. Previously I believe he did bust a Trust 6 speed dog box but hasn't had any issues with the OS.

[shanef]

I PM'd leewah regarding his set-up and he said this

I've got the whole 5 speed kit which includes the billet main shaft, billet output shaft, and billet sandwhich plate.

So he purchased the optional billet parts which is why he hasn't broken it yet.