Spark Plugs & Wires

100 percent pre-fired to ensure reliable operation Copper core center electrode for superior thermal conductivity Unique five-rib insulator reduces flashover and decreases voltage loss Dual copper and glass seal bonds the center electrode and...

100 percent pre-fired to ensure reliable operation Copper core center electrode for superior thermal conductivity Unique five-rib insulator reduces flashover and decreases voltage loss Dual copper and glass seal bonds the center electrode and...

100 percent pre-fired to ensure reliable operation Copper core center electrode for superior thermal conductivity Unique five-rib insulator reduces flashover and decreases voltage loss Dual copper and glass seal bonds the center electrode and...

100 percent pre-fired to ensure reliable operation Copper core center electrode for superior thermal conductivity Unique five-rib insulator reduces flashover and decreases voltage loss Dual copper and glass seal bonds the center electrode and...

100 percent pre-fired to ensure reliable operation Copper core center electrode for superior thermal conductivity Unique five-rib insulator reduces flashover and decreases voltage loss Dual copper and glass seal bonds the center electrode and...

2017-2018 Harley M8 Models, 2015-2018 XG500, XG750 & XG750A Cross references to NGK CR9EIX and Harley-Davidson RG6HCC The ultimate in spark plug technology and performance Iridium electrode is smaller than a standard electrode; requires less...

Fits 1999-2017 Harley-Davidson Twin Cams and 1986-2020 Harley-Davidson XL Cross references to NGK DCPR7EIX and Harley-Davidson 6R12 The ultimate in spark plug technology and performance Iridium electrode is smaller than a standard electrode; requires...

Conventional style spark plugs, available in OEM heat ranges for your Harley Plugs have a unique look with a black ceramic body and bold red logo/script Insulator is made of 95% pure alumina, features strong resistance to heat shock and superior...

Conventional style spark plugs, available in OEM heat ranges for your Harley Plugs have a unique look with a black ceramic body and bold red logo/script Insulator is made of 95% pure alumina, features strong resistance to heat shock and superior...

Conventional style spark plugs, available in OEM heat ranges for your Harley Plugs have a unique look with a black ceramic body and bold red logo/script Insulator is made of 95% pure alumina, features strong resistance to heat shock and superior...

Constructed of SAE660 bearing bronze Made in the U.S.A. Compatible Vehicles Years Make Make Notes 1995-1997 Harley-Davidson Bad Boy FXSTSB 1984 Harley-Davidson Disc Glide FXRDG 1958-1964 Harley-Davidson Duo Glide...