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Denso (5362) IU24 Iridium Power Spark Plug, (Pack of 1)Increased performance with World's smallest Iridium Center Electrode (0.4mm). To increase ignitability, the important point is to let the flame kernel produced by the spark to grow unobstructed. Normally, this can be accomplished by widening the spark gap. However, this causes spark voltage to incre...$8.22$9.16
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Denso (5317) IW27 Iridium Power Spark Plug, (Pack of 1)Increased performance with World's smallest Iridium Center Electrode (0.4mm). To increase ignitability, the important point is to let the flame kernel produced by the spark to grow unobstructed. Normally, this can be accomplished by widening the spark gap. However, this causes spark voltage to incre...$8.22$8.58
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NGK (7001) BR8HIX Iridium IX Spark Plug, Pack of 1Designed 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...$3.74$8.28
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NGK (3419) BR6HIX Iridium IX Spark Plug, Pack of 1Designed 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...$8.03$8.25
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Denso (5319) IW31 Iridium Power Spark Plug, (Pack of 1)Increased performance with World's smallest Iridium Center Electrode (0.4mm). To increase ignitability, the important point is to let the flame kernel produced by the spark to grow unobstructed. Normally, this can be accomplished by widening the spark gap. However, this causes spark voltage to incre...$11.60$13.38
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NGK (6014) BR9ECSIX-5 Iridium IX Spark Plug, Pack of 1Designed 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...$11.78$11.78
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Denso 3401 Spark PlugIridium plugs have an extremely long life as Iridium is 6x harder and 8x stronger than platinum. Because of the strength and hardness of iridium, there is virtually no electrode wear. This combined with a platinum ground electrode, creates a spark plug that is almost impervious to wear even under ex...$10.05$11.35
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Denso (5318) IW29 Iridium Power Spark Plug, (Pack of 1)Increased performance with World's smallest Iridium Center Electrode (0.4mm). To increase ignitability, the important point is to let the flame kernel produced by the spark to grow unobstructed. Normally, this can be accomplished by widening the spark gap. However, this causes spark voltage to incre...$9.87$14.41
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NGK (90117) ILTR6E11 Spark Plug - Pack of 4NGK Laser Iridium Spark Plugs are the choice of consumers, automotive enthusiasts, street racers and professional race teams around the world. Produced using advanced materials and cutting-edge technology, NGK Spark Plugs help maximize engine power and operating performance ride after ride.$33.01$33.01
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4 New NGK IRIDIUM IX Spark Plug BR6HIX # 34194 New NGK IRIDIUM IX Spark Plug BR6HIX # 3419, Iridium IX Plug, 14mm Thread Size, 12.7mm (1/2") Reach, 13/16" (20.6mm) Hex Size, Gasket Seat, Resistor, Removable Terminal Nut, Fine Wire (0.6mm) Iridium Center Electrode, Tapered Cut Ground Electrode, .031" (0.8mm) Gap, Heat Range 6$30.76$30.76
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Quicksilver 889246Q39 NGK ILFR6GE Laser Iridium Spark Plug, 1-PackThe ILFR6GE Laser Iridium series plugs come pre-gapped as specified by your engine manufacturer. Always check the gap prior to installation. Use only the spark plug listed in your engine owner's manual. Using the wrong plug can reducing optimum performance, reduce fuel economy or cause damage to you...$19.00$27.69