[wookwook]

I did the NGK cooler plugs when I was having issues with pinging (also called Knock Reduction or KR here) with the Race Chip in the hottest summer months. They helped a bit but did not eliminate the pinging. I tested over the counter ping reducer and that worked, but in the end it seemed like piling on band aides and was a major factor to decide to go the tuning route. I posted a rant somewhere on here about not being able to tune (i.e. warranty) for your local fuel, but water under that bridge. Never looked back. I'm back on OEM plugs, in the end you really want the biggest spark without KR.