felix medina has the record on his class 9.36 . 20 yrs of reserche on b series.
oh they make full out race trany for b series

jonathan reynolds is i believe 9.57 on a k less then 5 years reserche use your imagination
they use stock k trany

just a example if you look the b series ran 9.36,the k ran slower.
but the point is with b series they are maxed out at that number k has lot more in it