OE Ford Motorcraft Iridium Spark Plug for Ecoboost
The Motorcraft SP594 is a genuine OEM iridium-core spark plug designed for modern Ford EcoBoost engines, delivering enhanced durability, stable idling, and optimal combustion efficiency under boost.
Product Overview
- Part Number: SP594 (Engineering ID: CYFS12YRT3)
- Supersedes: Older Ford revisions including SP542, SP578, and SP534
- Electrode Material: Fine-wire Iridium center tip with copper core
Key Features & Benefits
- OEM Precision Fit: Engineered specifically to Ford strict factory tolerances, ensuring flawless integration with computerized ignition and emission systems.
- Superior Durability: Iridium fine-wire construction resists arc erosion and oxidation, offering a reliable service life interval up to 100,000 miles under normal driving conditions.
- Optimized for Turbocharging: Handles high cylinder pressures and thermal ranges seen in modern turbocharged direct-injection (EcoBoost) configurations without premature fouling or missing.
- Resistor Interference Suppression: Built-in resistor type design prevents electrical interference with onboard vehicle electronics and false check engine lights.
Fits:
2021-26 Ford Bronco All Engines
2019-26 Ford Ranger All Engines
2017-20 Ford F150 3.5L Ecoboost
2015-25 Ford F150 2.7L Ecoboost
2018-21 Ford Expedition | 
