Roush Performance
Colder Spark Plug, Mustang and F150 (2005-2007)

Works with 3 valve 2005-2007 4.6L Mustangs and 2004-2007 5.4L F-150s Specifically designed to handle high boost pressure and air flow of ROUSHcharged™, turbo charged, and supercharged engines 0.045 inch gap ROUSH Supercharged applications should be regapped to .032-.035 Helps prevent pre-ignition and detonation of fuel due to high cylinder temperatures Operates on heat range colder than the stock Mustang plug Each sold separately Part #401546