Mustang Ford Racing Cold GT Spark Plug Set (2005-2008) Installation Instructions

Tools Required:
  • Ratchet & Socket Set with Extension
  • Torque Wrench
  • Nickel Anti-Seize
  • Dielectric Grease
Install Difficulty:
  • Difficulty
  • Easy Project
1. To begin installing your new Mustang Ford Racing M-12405-3V0 Cold Spark Plug Set, unplug the coil on plug and fuel injector connectors. Loosen the coil bolts with a 7mm socket. Remove the coils.
Mustang Ford Racing Cold Spark Plug Set Install Image
2. Remove the spark plugs with a 9/16 inch deep socket or a 9/16 inch spark plug socket.
Mustang Ford Racing Cold Spark Plug Set Install Image
3. The new plugs may need to be gapped, depending on the motor's configuration. These plugs are being gapped to .032 inch for a supercharged motor. The .002 inch strap spring back is being accounted for by gapping to .030 inch. A specialized tool is available to gap these plugs. It can also be done with a vise, screwdriver, spark plug socket, and feeler gauge (as shown here).
Mustang Ford Racing Cold Spark Plug Set Install Image
4. Apply a thin coating of nickel anti-seize to the barrel of the Mustang spark plug. This will prevent carbon build up between the plug and the head. Note that the threads are pre-lubed from the factory and do not require additional anti-seize.
Mustang Ford Racing Cold Spark Plug Set Install Image
5. Apply dielectric grease to the coil on plug boots on the Mustang coil packs.
6. Install the spark plugs using 9/16 inch deep or 9/16 inch spark plug socket. Torque to 25 ft. lbs.
7. Reinstall the coil packs. Connect the coil and injector plugs. You are now done installing your Ford Racing Mustang Spark Plugs!
Mustang Ford Racing Cold Spark Plug Set Install Image