Motorcraft Iridium Spark Plug SP-538-A
Tested to Ford specifications for performance and emission standards.
- Nickel plated shell for corrosion resistance and improved appearance.
- Same part that was installed when the vehicle rolled-off the assembly line
- Designed to deliver quick starts, enhanced fuel economy and smooth acceleration with 100,000 mile service interval
- Proprietary platinum pad on the side wire electrode with iridium enhanced center electrode.