These are the Upper / Trailing spark plugs on the 13B Rotary engines.
Safe for Stock Port / Street Ported motors.
Some people prefer using BUR9EQP for Leading and Trailing spark plugs.
NGK Laser Platinum® spark plugs provide high ignitability and longer service life. Dual platinum surfaces ensure slow wear rate providing stable idle, superior anti fouling, improved fuel efficiency and lower emissions.
*Sold in quantities of 4*