no fpc here Another of the secrets to the 5.3’s success is how high Jon spins it. The engine regularly sees speeds above 8,000 rpm. Yes, you read that right. 8,000 rpm on stock pistons, rings, rods, rod bolts, bearings and gaskets. All of this on a hydraulic roller setup with LS7 lifters no less. Even the rockers are stock, albeit with Brian Tooley Racing trunnion upgrades. To say that we were shocked to find out how quickly it was turning without coming apart would be an understatement.