Eliminate that antiquated Speed Density System and upgrade to the more effective and efficient Mass Air Flow System. Once you have Mass Air Flow, you can now upgrade other engine parts such as Cams, Heads, Exhaust, Etc., and actually realize

m-6007-C54 500 HP supercharged 5.4L DOHC engine Original equipment in the 2008 SVT Mustang 500 HP @ 6000 RPM, 480 LB-FT of torque @ 4500 Fully Dressed including accessories and supercharger Does not include