Originally Posted by 2slofouru
I don't remember seeing it mentioned, but do you offer this for ej20g and ej20k heads? Also, is it detrimental to strength of the combustion chamber, will it weaken the areas around the valve seats or plug holes?
I'm not sure about the EJ20G/K heads. I'd need to see pictures of them. If the heads have the standard style hemispherical combustion chamber, we can run the same program on them. If they have the older star shape chamber, however, we can't do much with them.
There is no weakening with this program because we don't touch the area around the spark plug port and the valve seats. Most of the material that is taken off is on the outer edge of the chamber.