Beware of fake NGK iridium and others being sold on Ebay and internet.. Bought a set from seller with perfect feedback and box looked like factory... Went online to double check and welds are not the same, no iridium on tip, porcelain quality is poor(mine had some chips and reports of these breaking online reports). These plugs will never last the service intervals. Beware! Got full refund including shipping.. Seller is still selling them and ebay doesn't do anything to keep these sellers off ebay

 

Yup, have to trust who you are getting stuff from. Id rather pay more and get piece of mind.