NGK Iridium IX DCPR7EIX Spark Plugs Compatible with 1999-2016 Harley Davidson Twin Cam (Pair)
Gain up to 3HP just by using these plugs! • The ultimate in spark plug technology and performance from the industry leader • The iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4 the size of a conventional nickel electrode • Ultra-small diameter center electrode reduces voltage requirement and extends ignition system life • New metal shell plating has enhanced anticorrosion qualities • Come pre-gapped