As long as IK/KH/Q/W/T16/20L (Original 1.1mm) once is gapped to 0.8mm => more power and performance can be expected (immediate effect after installed).
Measurement of plug gapping to 0.8mm will be shown to buyer during order collection.
I plan to buy skyline GTT (M) or Silvia S15. Please gimme some advice on this and what are d things to prepare/check about these cars. Still dunno which one to choose but preferred color is white n...