For MerCruiser 496 Mag & HO and MIE 8.1L & HO.
- Made by AC Delco with nickel alloy tip, copper core and ribbed suppressor seal for durability and performance
- Check your engine owner’s manual for the correct spark plug and use only the plug as recommended by your engine’s original equipment manufacturer
- Don’t just clean used spark plugs, replace them with new plugs for better performance
- Replace all the engine plugs at the same time