I would agree with Photoman, and that is the route I took. Even if I could do it all at once, it was more fun doing it incrementally. When I put the NW CAI on it was exciting to hear the SC whine, and the extra power. It was like I had a completely different and much faster car. About a month later, I got the C3 pulley. When I put that on..... ohhhh my gosh. Now that was fun. The low end power gains were off the hook. Now, another month later, I am going to Atlanta on 12/12 to have my LET tune done. I am soo excited to get it done. From what I hear, it is going to be more fun that when I got the C3. If I had of done everything at one time, I would have missed out on all of the experiences that are etched into my permagrin memory.