Keep your high-performing Mercury Racing 575 SCi engine operating at its peak with these premium Quicksilver Spark Plugs. Validated for high-RPM marine use, they are a direct replacement for NGK R5673-8. Featuring trivalent metal plating and a durable copper core, these plugs provide the corrosion resistance and heat removal necessary for high-output racing applications.
- Fits Mercury Racing 575 SCi high-performance engines
- Direct replacement for engines requiring NGK R5673-8
- Constructed for long life and optimum performance under load
- Trivalent metal plating provides superior anti-seizing properties
- Includes four (4) premium Quicksilver spark plugs
