Densecharger has a CAI kit for 01 Mustangs. It is all plastic tubing as to not absorb alot of heat like the chrome and metal ones do. They have kits that run from the throttle body down, or just the MAF sensor down, or a kit that come with a MAF sensor.It also comes with a K&N filter. The kit places your filter facing downwards in your side fenderwell. I dont remember the cost but the website is
www.densecharger.com .