CCH388 Copper Plus spark plug. CCH388

When it comes to the modern Milwaukee-Eight and Street models, you need a plug that can handle the higher demands of a contemporary engine. These Champion Copper Plus CCH388 plugs are the perfect replacement for the factory RG6HCC units, carrying OEM number 31600012. They feature a 10mm thread and utilize a 16mm socket for installation. Designed to fit 2017 to 2026 Milwaukee-Eight models, as well as 2015 to 2020 XG500 and XG750 Street models, these plugs include the SAC-9 semiconductor resistor to prevent electrical interference with your bike's electronics. The Ultraseal coating on the shell ensures long-lasting protection against the elements. These are sold individually, so remember that Milwaukee-Eight engines require four per service.