Turning up an electronic cat requires a re flash. Most Cat dealers can do this for you. Will have to be hooked up to their computer. Turning one up may in some cases requires a factory password from Cat, not hard to get, just cost money. I am not positive the horsepower ratings available above 550. But the dealer will be able to tell what is available with the hardware, injectors, turbo, pistons, that your engine was built with.