How much hp can the stock B series tranny support?

 

more than likely it supports more than you have. some people who are really worried about it have their gears cryo-treated for strength, or if you're really hardcore get a quaiffe gearset or something. they'll hold 700hp+, it's just a matter of how often you'll be exploding gears. usually that comes from hard shifting though, so the HP number is unlimited. some people with half that power blow third gear b/c they shift it like a beast.