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.
Can someone give an opinions about how strong the stock pistons and block for GTR34? How much horsepower it can takes in a safer limits? Is it using tomei camshaft 270degrees is too much for stock GTR...