NGK CR8EK spark plug, alternative for 8V Stelvio Griso Norge NTX

NGK CR8EK spark plug suitable for several late model Guzzi big twins, allowing the use of a better than original quality NGK spark plug cap. This is a non-platinum spark plug for 1200 Sport 8V, Griso 1200 8V, Stelvio, Stelvio NTX, 2010 and later Norge 1200 8V. Suitable as a replacement original Guzzi spark plug numbers 05717030, GU05717030, and 639687.  This spark plug has a threaded stud terminal suitable for the SD05F spark plug cap.