When i was installing this cai i thought it was gonna be pretty easy. I've never installed one b4 so i was expecting some good instructions but the instructions on how to install this were awful. Finally figured out how to install it and boy is it a tight fit. Anyways, I got it all installed and once i started my stang and tested it out you could totally tell the difference. This is a definate buy for any mustang and I recommend it to anyone.