iridium plugs, anyone using em?
One of the horspower shows on Spike did a test this weekend with a new vs old plug and the new 383 I beleive, put out about 6 more hosepower with the new type plug.
I don't remember if it was the NGK but they had what looked like 4 points on them.
Is there any research that says new type plugs are a waste of money or is that just everyones old time thoughts?
I don't remember if it was the NGK but they had what looked like 4 points on them.
Is there any research that says new type plugs are a waste of money or is that just everyones old time thoughts?




