4 NGK LASER IRIDIUM Spark Plug ILTR6A-8G MazdaSpeed 3 6;

4 NGK LASER IRIDIUM Spark Plug ILTR6A-8G MazdaSpeed 3 6, Extreme Long Life Laser Iridium Plug, 14mm Thread Size, 25mm (.984") Reach, 5/8" (16mm) Hex Size, Tapered Seat, Resistor, Projected Tip, Solid Terminal Nut, Special Firing End Construction, Iridium Tipped Fine Wire Center Electrode with Platinum Tipped Tapered Cut Ground Electrode, Solid Terminal Nut, .031" (0.8mm) Gap, Heat Range 6