Improve Engine Performance. Unleash your EcoBoost Mustangs hidden power with a SR Performance Throttle Body Spacer. The SR Performance throttle body spacer increases plenum volume to improve the low to mid range torque from your Ponys stock turbocharged 2.3L engine, with noticeable gains seen between 800 to 2500 RPM.Better Fuel Economy. The SR Performance Throttle Body Spacer not only improves the performance of your Pony, but with its unique “Spiral Bore” design it also improves fuel efficiency. The Spiral Bore "spins" the incoming air for improved atomization of the air fuel mixture for better combustion.Billet Aluminum Construction. CNC machined from high quality billet aluminum the SR Performance Throttle Body Spacer includes all the necessary hardware required for a simple straightforward bolt-on installation.Application. The SR Performance Throttle Body Spacer is specifically designed to fit the 2015-2023 EcoBoost Mustangs equipped with the turbocharged 2.3L Inline 4-cylinder engine and the factory throttle body still installed. No tune required.