These injectors are a direct drop-in intended for the 1.6L EcoBoost engine and can increase flow up to 30%. This additional flow will fuelup to 350whp on the Stock HPFP and is compatible with all fuel types. These Bosch injectors are a great solution for a 1.6 EcoBoost engine that has reached the limits of the stock fuel system. Tuning is required for these injectors to work properly.Fits 2014-2019 Fiesta ST