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.
Rotor heads......wait for this Jap movie titled Speedmaster due to be released soon in Japan. It's gonna boost your rotary libido sky high. Most probably if the movie rocks then hopefully our RX7 car...