Both the current F-150 and Mustang went on sale as 2015 models, so assuming a six-year production run both will be replaced for 2020.
The Ford Performance Shelby FP350S is not street legal – it's designed to participate in a number of racing series, including Trans Am, NASA and SCCA club racing.
The company is now offering an engine calibration and cold air intake that adds more power and loads of torque to the already-potent four-cylinder model.