This is the stock motor with bolt-ons. It does not need a tune, however once things are changed from stock the stock programming may run, but you are not getting all of the power you are supposed to. I have driven the car with the hose on for a few months. It does not LEAK, it SEEPS from under the hose clamp. I only lost half of the overflow in a few months. YES a new hose will fix this, or possibly even just better clamps. I do not have the time to take care of these things. That is why the car is so cheap, need the room and no time to take care of the little things. Not really looking for trades right now but need to sell due to financial issues, I would take $4k for the car. That is less than I bought the car for. LMK