I'm making around 650whp with my car and the standard gears don't last too long there. I run low boost on the street which is around 550whp and they seem to last a lot longer. I figured with a stronger set it should hold with no problem. If we could get something to hold around 600 to 700 we should be good. Most of the cars here make around 400 to 500 turbo and 200 to 300 NA. I wouldn't mind straight cut gears cause I don't stay in those gears long enough for the noise to bother me. I installed a straight cut 3rd gear set on a pulsar gtir and it's really not that bad.