Procedure was warm up on old plugs and then change for new plugs for the chop and WOT thru 6th, pull in clutch, kill engine and cruise to a stop. Take out plugs and put old ones back in. It felt great and I think it's fine but I will try the 165 mains on them when I get them. You think they look lean in the photos? Sent from my SM-G955U using Tapatalk