I have seen these used in Yamatos. My question is what spark plug works the best, as I figure you will have to run a colder plug than the normal B9ES used in the 14MM head???? Is there anything else recommended? I assume you might also have to make sure the adaptor is flush on the inside of the head? I have also heard of a "speed secret" that says to let the adaptor extend a little bit into the head? Also, I have not read anything that says these are legal or illegal to use in stock racing????
http://eastwood.com/shopping/product...roductID=11418
http://eastwood.com/shopping/product...roductID=11418
Comment