Bosch OE Fine Wire Platinum Spark Plugs feature a specially engineered, yttrium enhanced ground electrode that provides 2X longer service life compared to standard copper plugs Unique 360 degree, continuous laser welded fine wire platinum firing pin design delivers better corrosion resistance, ignitability, and performance Ribbed insulator design seals tightly against the wire boot preventing misfires due to flash-over Nickel-plated rolled threads provide superior resistance to corrosion and do not require anti-seize for installation Bosch Platinum spark plugs are pre-gapped at the factory and do not require a gap adjustment prior to installation Compatible with select vehicles (Note: engine affects fitment - verify specific fitment details with amazon confirmed fit fit checker above): ACURA: 2007-09 MDX, 2005-08 RL, 2002-06 RSX, 2004-08 TL, 2004-08 TSX; HONDA: 2003-07 Accord Compatible with (continued): HONDA: 2002-11 Civic, 2002-09 CR-V, 2003-11 Element