Ford Racing Performance Parts 2005-2010 MUSTANG GT - COLD AIR KIT WITH PERFORMANCE CALIBRATION Fits 2005-2009 Mustang GT with manual or automatic transmission. Approximate increase of 20 hp over stock Kit includes: Ford Racing ProCal tool with performance calibration for significantly improved throttle response and performance feel Disposable air filter element M-9601-B Utilizes production quality components which mount in the stock location. The high flow molded plastic bucket features a painted Ford Racing logo with unique clean-air tube which provides an enhanced intake sound. Premium (91 octane or higher) fuel only Due to multiple powertrain calibrations, online registration is required to receive ProCal calibration delivery tool after purchase. Ford Racing does not ship ProCal tools directly overseas. Customers must make special arrangements with their Ford Racing Distributor. Powertrain calibrations are developed and supported for U.S. and Canadian vehicles only Unlike our competitors, all Ford Racing Power Upgrade Packages are 50 state emissions legal and eligible for limited warranty when installed by a Ford or Lincoln-Mercury Dealer Federal and state laws prohibit any person from installing aftermarket add-on or modified parts prior to the sale of a new motor vehicle