Ford Racing M-12405-3V12MM Spark Plug for 3-Valve Modular Engines

The Ford Racing M-12405-3V12MM spark plug is engineered specifically for high-performance applications in Ford modular 3-valve engines. These spark plugs feature a proprietary zero-degree design that is unique to Ford 3-valve engines and exclusively available through Ford Racing Performance Parts.

Key Features:

• Proprietary zero-degree design for Ford 3-valve modular engines
• One heat range colder than OEM Ford Mustang GT spark plugs
• Two heat ranges colder than stock 5.4L truck engine spark plugs
• Optimized for engines with higher-than-stock cylinder combustion pressures
• Direct replacement for forced induction and performance applications
• 12mm thread size for proper fitment

Ideal for supercharged, turbocharged, or naturally aspirated builds running increased boost or compression, these spark plugs help prevent detonation and ensure reliable ignition under demanding conditions. The colder heat range dissipates combustion heat more effectively, making them the perfect choice for modified Ford 3-valve engines in Mustang GT, F-150, and Expedition applications.