Larger - than - stock throttle bodies deliver increased performance by allowing more air to enter the engine. The Edelbrock 103mm Throttle Body 38988 features analog electronics and is designed for use with the 2015 - 17 Ford Mustang Modular Inlet Supercharger. This throttle body is also required when purchasing the Pro Tuner Supercharger System for 2015 - 17 model - year applications.