Replacement For - OE Number:5L3Z-9F593-AA; suitable for Ford F-150 STX, XL, XLT 4.2L 2005-2008; for Ford 4.2L V6 motor.
Function - High-efficient fuel sprays and High Impedance Coils enable fast start-up in cold environments, low fuel consumption, and better performance.
Material - Good quality effective O-Ring that can seal fuel vapors in and keep them from leaking.
Installation - Professional installation is highly recommended: Fuel injectors directly affect the air/fuel ratio for the engine and new fuel injectors do require a new or updated tune. We also suggest that you check the other component of the engine before installation.