all i did was upgrade the cams,valves,ratainers,and springs, did a port and polish with balancing and looking into geeting bigger injectors and upgraded fuel pump, so you definitely do need some mods, then go get it tuned, im pushing around 210 to the wheels, looking to get at least 250HP before i think of turboing it, still runing stock ecu and mani, so still a lot of power left...