NGK Iridium IX vs Denso Iridium Power - What's the difference?
SUBSCRIBE - http://www.youtube.com/subscription_center?add_user=StreetandCircuit 0:14 Why would you fit Iridium spark plugs? 1:14 You don't need to worry about the gap like Platinum spark plugs 1:30 Gap problems with Platinum spark plugs 2:30 Why I
