Denso Nickel Spark Plug K20R-U11 / K20RU11 / 3139 Replaces BKR6EY11 BKR6EYA11U-Groove is an innovative design that helped to make DENSO spark plugs famous. The plug employs a unique, channeled ground electrode designed to generate a larger spark nucleus at the point of ignition. Copper glass seal helps heat dissipation Standard U-groove Deeply inserted copper core Heat resistant nickel plating DIMENSIONS: Height (mm): 43 Width (mm): 24.5 Length (mm): 85 If you are unsure as to whether this is the correct part for your vehicle, please don't hesitate to contact us. Alternatively please use the cross reference table above.