4 New NGK Iridium IX Spark Plugs BR8HIX # 7001, Iridium IX Plug, 14mm Thread, 12.7mm (1/2") Reach, 13/16" (20.6mm) Hex Size, Gasket Seat, Resistor, Removable Terminal, Fine Wire (0.6mm) Iridium Center Electrode, Tapered Cut Ground Electrode, .032" (0.8mm) Gap, Heat Range 8

Designed specifically for the performance enthusiast, Iridium IX offers extreme ignitability, improved throttle response and superior anti-fouling. The 0.6mm laser welded fine iridium tip ensures high durability and a consistently stable spark and the tapered ground electrode minimizes electrical qu...