SPARK PLUG IRIDIUM IX TR65IXPart No. TR65IX Type SPARK PLUG Brand NGK SPARK PLUGS Unit of Measure EACH Description NGK Iridium IX Spark Plug Warranty Original Equipment Seat Type Tapered Thread 14 Reach 17. 5 Hex Size 16 Resisted Yes Gap 1. 5mm OEM Number 3692 Features NGK's IX Iridium series plugs were designed specifically for the performance enthusiast Fine wire center electrode ensures high durability and a consistently stable spark Trivalent metal plating provides superior