ROUSH 421826 2015-2017 Mustang 5.0 Liter V8 Cold Air Kit Fits 2015-2017 5.0 Mustang Increased performance by 10.4 horsepower and 8.54 foot-pounds of torque Improved throttle response; Less restriction than stock intake No calibration required and factory warranty valid when using included 85mm MAF insert Not approved for sale or use in California or states that require an EO number