This NGK SIMR8A9 Laser Iridium Spark Plug (91064) is designed for enhanced engine performance. It features an iridium middle electrode and an earthed electrode, with an interference suppression of 5 kOhm. The spark plug has a spanner size of 16 mm, a thread size of M10 x 1.0, and a thread length of 19.0 mm. The spark position is 3.0 mm. The use of iridium extends the service life of the spark plug compared to standard ones. The laser-welded, ultra-fine iridium centre electrode ensures perfect ignition performance and promotes the spread of the flame front in the combustion chamber, leading to optimized starting behavior. This contributes to more efficient engine performance, reduces fuel consumption, and lowers environmental pollution. It is suitable for Honda CRF 300 models from 2021-2022. The material is copper core with iridium. The condition is new.