About the hptuners it think you would have to get a computer from what ever year car software that your friend has but i think when you buy hp tuners you get to pick two car I haven't look at that since i finished the swap in my other car. Now if you want to save some money you can use the stock wiring harness it basically a stand alone harness anyway and send it out andthe wires you need brought out. I think that was like
200 bucks.