i have stage 3 and prihana sc with the riva stage 3 prop and the splines bust out of the prop they should warnty it.but i need a bigger prop because i and hitting the rev limiter so what size should i run in there to get 83mph out of it .should i run the 15/20 or what some one let me know asap.or jerry do you think they will cover the prop the spline keys busted.pm me