i had some plug trouble today and i found that the b8 plugs are not very good,i fouled alot of them while breaking in a motor.
so i tried some b9 and it seems to be working good.
i have to different kind of b9,s but i dont know the difference other than the GV at the end
now the question,whats the difference in these plugs.........the blue label KGK plugs seem to also last alot longer.
WHATS THE DIFFERENCE IN B9E AND B9EGV