This one good for 600 hp pretty easily. Some of the components can handle way more and some probably wouldn't. The Vasco 300M input shaft will handle well over 1000 hp (more than the trans will ever hold) so it's overkill but I'm right in that area where I might have broken the stock input shaft at the power level I'm at. They're only good for about 550 hp, depending on the car weight and everything else. So I changed it.