- 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 less voltage
- Hotter spark and extended spark plug service life compared to conventional plugs
- Has the distinctive black ceramic with red lettering and gold-colored corrosion-protected coating on the metal shell
- Exceed OEM specifications for plug service life
- Sold in pairs in convenient blister pack