hehe my mate in sydney has a datsun coupe over 450hp and he is using the standrd box! ive been in it and it hold the power i asked my mechanic about that for mine and he said the standard box is very strong and will hold up to any power up 2 500-600 pending on how u drive !!

but i would waste money on box till something happens 2 it then get another standard build it up!