2008 MUSTANG GT POWER UPGRADE PACKAGE M-FR1-MGT Unlike the competition, Ford Racing Power Upgrade Packages are 50 State Street Legal and covered under WARRANTY when Ford or Lincoln Mercury Dealer installed and certain conditions apply. See www.fordracingparts.com for warranty information. Fits 2008 Mustang GT with Automatic or Manual Transmission. Does not fit 2005-07. Use M-2006-FR1 for 2005-07 applications Approximate increase of 20 horsepower over stock 85mm Cold Air Kit M-9603-GTB Muffler Kit M-5230-GTA Performance Oil Filter Premium fuel only Pro-Cal tool voucher included with kit Ford Racing Cold Air Kits utilize production quality components which mount in the stock location. The higher flowing molded plastic bucket features a painted Ford Racing logo with unique air tube providing an enhanced intake sound Due to multiple calibrations, online registration is required to receive Pro-Cal tool after purchase Engine calibrations are developed and supported for U.S. and Canadian vehicles only 50 State "Street Legal" (E.O. #D-598-2)