Cold Spark Plugs

The Ford Performance M-12405-35T spark plug set is engineered to improve performance in high-boost and tuned EcoBoost engines. Each plug features an iridium tip for a longer lifespan and more consistent burn, along with a colder heat range and a tighter .031" gap compared to OEM plugs. This design is crucial for preventing spark blowout, a common issue when boost pressures are increased beyond stock levels, ensuring a more complete burn and preventing misfires. These spark plugs are a full heat range colder than stock, making them ideal for modified or custom-tuned vehicles that experience higher cylinder combustion pressures. Their direct-fit design allows for easy installation as replacements for the factory spark plugs, and they are fully compatible with the stock coil packs. The set includes six plugs, providing a complete solution for your engine. Fitment includes a wide range of Ford vehicles equipped with 3.5L EcoBoost engines (2011-2021 F-150, 2017-2021 Raptor, 2010-2019 Taurus SHO), 2.7L EcoBoost engines (2015-2024 F-150, 2021-2024 Bronco, 2024 Ranger), 2.3L EcoBoost engines (2021-2024 Bronco, 2019-2024 Ranger), and the 3.0L EcoBoost (2023-2024 Bronco Raptor). Note that for 3.5L EcoBoost F-150 and Raptor models, fitment is specified for vehicles built up to July 2021. For optimal performance, especially after modifications, these plugs are a recommended upgrade.