rns11z unless you are currently making more than 300rwkw you dont need to change teh conrods as iam using the factory ones and using it for racing purposes and still havent had a rod failure and going on what i have seen i am nit going to change it either. It is only a ploy buy the manufacturers to tell you that they cant handle it so that you spend unneccesary money on stuff that you dont need so that you can tell the boys at the pub.