Oregon Spark Plug No. 77-324-1. This is a quality aftermarket spark plug that replaces Champion RCJ7Y, Bosch WSR9E, NGK BPMR4A, and Nippodenso W14MPR-410.
Champion Shop Pack (24) RC12YC. This is a shop pack of 24 spark plugs that replaces Bosch - FR8DC, NGK - BCPR5ES, Nippondenso - Q16PR-U11, Autolite - 5224, AC Delco - FR2LSK. This is a Resistor Plug.
Champion Shop Pack (24) RJ19LM. This is a shop pack of 24 spark plugs that replaces Bosch - W7AC, NGK - BR2LM, Nippondenso - W14LM-U, Autolite - 414 and Champion-J19LM.