All depends on what you want and how much you wanna spend, I played with my one n/a diesel it had a kn on it, I up'd the fuel pressure a bit checked the slack on the throttle cable and had a more free flowing exhaust on it, it went well and sounded nice i lowered ut and ur made it feel alot faster than i was going lol, I've always played about with turbo and ended up buying a fiesta turbo and swapped everything over which I haven't looked back at