Hi all, I have a CAT 5ek31696 that is all stock with the exception that it has a 600 horse flashfile in it. I have ET and SIS as well and I have found that the engine was originally rated at 355. I am no guru for tuning or go fast parts just a hard working mechanic. My question is in order to give this engine some power will I need to change pistons, cam, injectors & turbo and possibly oil cooler depending on the power level I wanted to achieve? It's a Dumptruck and when it's loaded it is pretty sad. Is there anything I can do to help it without spending a ton of money?