ngk platinum nice for high revs...For a 4G13 engine which spark plug is better? NGK Platinum or Bosch Super-4?...
4g13p? I use the NGK platinium G-power.. Very good smooth in high rpm. Then changed to side gapped spark plug that sell by skywalker, feel more smooth on high rpm.. At last, sent my ngk platinium for him to side gapped. till now, the spark plug still serve me well.. Very smooth on high rpm.. =)

Bro skywalker is sifoo...![]()