Denso Iridium Spark Plugs for the ultimate performance your engine can produce. Worlds smallest electrode provides extreme high power and accurate ignition.
- IY24 - Takegawa KLX 4V Superheads, Kitaco CRF Ultra SE heads (cross reference NGK ER8EH)
- IUF22 - all heads using CR7HSA standard NGK plugs
- IUF24 - all heads using CR8HSA standard NGK plugs