Description:

Densos standard plugs have always offered a patented U-groove ground electrode producing for a larger, hotter spark. Copper core for better thermal conductivity. Machine rolled threads to reduce cross-threading and seizing. The plug insulator is constru Model # 4228 Features: Denso Part# U20EPR9 U-Groove Ground Electrode Item Dimensions: 3. 4" L x 1" W x 1" H.