DRAG SPECIALTIES 2103-0207 Spark Plug Set for Panhead 48-74 Big Twin
Copper core electrode prevents oxidation and corrosion and has good electrical and heat conductivity for long spark plug service life. SPARK PLUG. 1949-1957 Harley-Davidson Hydra Glide EL – -. 1958-1964 Harley-Davidson Duo Glide FLH – -.