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.
sorry..:) really wanna know coz as we read this forum everyday.. everyone is selling good product a few knows how to installed and tuned it. So my question is..