Ford Racing M-12405-35T EcoBoost Cold Spark Plug Set for 2010-2024 F-150 Bronco

Vehicle Fitment

• 2011-2021 Ford F-150 (3.5L EcoBoost V6, RWD/4WD) - vehicles built up to July 2021
• 2015-2024 Ford F-150 (2.7L EcoBoost V6, RWD/4WD)
• 2017-2021 Ford F-150 Raptor (3.5L EcoBoost V6, 4WD) - vehicles built up to July 2021
• 2010-2019 Ford Taurus SHO (3.5L EcoBoost V6, FWD/AWD)
• 2010-2019 Ford Flex (3.5L EcoBoost V6, FWD/AWD)
• 2021-2024 Ford Bronco (2.7L EcoBoost V6, 4WD)
• 2021-2024 Ford Bronco (2.3L EcoBoost I4, 4WD)
• 2023-2024 Ford Bronco Raptor (3.0L EcoBoost V6, 4WD)
• 2019-2024 Ford Ranger (2.3L EcoBoost I4, RWD/4WD)
• 2024 Ford Ranger (2.7L EcoBoost V6, RWD/4WD)

Fitment Notes

• F-150 3.5L EcoBoost and F-150 Raptor 3.5L EcoBoost fitment applies only to vehicles built up to July 2021 - 2021 vehicles built after July 2021 use a different plug design
• Designed for engines operating at higher-than-stock cylinder combustion pressures - ideal for tuned or boosted applications
• Not intended for stock, naturally aspirated, or non-EcoBoost Ford engines
• For 2021-2026 3.5L engines (post-July 2021 build), gap to 0.026-0.028 inch; plugs may not include a washer and use a tapered seat design

Features

• One heat range colder than stock - reduces knock risk under boost or high-RPM conditions
• Iridium tip construction for consistent ignition and extended service life
• Pre-gapped to 0.031 inch (0.8mm) for straightforward installation
• OE-quality construction manufactured in Japan to Ford Performance standards
• Projected insulator design improves combustion efficiency and self-cleaning ability
• 14mm thread size with resistor for EMI suppression

Specifications

• Plug Type: Iridium Tip, Projected Insulator, Resistor
• Seat Type: Tapered Seat
• Thread Size: 14mm
• Reach: 0.750 inch
• Pre-Gap: 0.031 inch (0.8mm)
• Heat Range: One step colder than OEM stock
• Quantity: Set of 6
• Package Weight: 0.85 lbs
• Package Dimensions: 4.5" x 4.5" x 10.75"

Included Components

• 6x Cold Spark Plugs (pre-gapped to 0.031 inch / 0.8mm)

Product Description

The Ford Racing M-12405-35T is a complete set of six cold-range iridium spark plugs engineered for EcoBoost engines running higher-than-stock cylinder pressures. Whether you're running an aftermarket tune, increased boost, or pushing hard at high RPM, these plugs help maintain ignition reliability and knock resistance where stock plugs may fall short. The colder heat range draws heat away from the combustion chamber more efficiently, reducing the risk of pre-ignition under demanding conditions.

Built to OE quality standards and manufactured in Japan, these plugs cover a wide range of Ford EcoBoost applications from 2010 through 2024, including the F-150, Raptor, Bronco, Ranger, Taurus SHO, and Flex. They arrive pre-gapped at 0.031 inch for easy drop-in installation. For tuned EcoBoost trucks, Ford Performance recommends replacing these plugs every 15,000-20,000 miles to maintain optimal performance.