The ONLY plugs you should use for your Infiniti are NGK Platinum OEM plugs. They are $8.75 apiece from Infiniti of Scottsdale or $66.00 for the set. For a time, Bosch spark plugs were considered usable until owners found some serious issues with them. After much discussion it was confirmed by more than one Infiniti Technician that Bosch would cause problems. It was also officially not recommended by Infiniti. Again, only use NGK's for performance and reliability.Contributors include: palmerwmd, jeff otmg, jtesnesky, q45tech
