everyone will say the piper t2 you gotta have 14+psi...but its popwer is later in the rev range..so no low down grunt..sorry...im after a cam kit meself and all i want is torque...heard of a P.E one that only gave 10bhp but 35ft/lb of torque....not sure how true this is,but know a few people on here dopnt rate them very much!