Not sure which 2001 Ford Mustang Air Intake Systems are right for you? We have over 2412 customer reviews, with an average rating of 4.5, to help you find exactly what you're looking for. Marc Z from Seabrook, TX said, "The kit came as expected. I wanted more sound out of my 01 GT mustang which was my main reason for the purchase. I must say that couldn't tell as huge of a difference as I was reading in some of the other reviews. I already had a flowmaster installed. There really wasn't much of a difference. Maybe at 4000 rpm a little bit more of a roar. It was my first time to install an intake and it did take a total of 1.5 hours to get the old out and the new one in just as it stated. The instructions were good and the kit fit just right. Cheapest price I could find. Performance you can tell a little improvement but only when you rev up to the higher rpm's. In general I'm still happy about the purchase."