Reference: DCPR7EIX x 2
Brand: NGK SPARK PLUGS
SPARK PLUG NGK IRIDIUM IX HIGH PERFORMANCE FOR HARLEY DAVIDSON BIG TWIN/TWIN CAM '99-'17
The ultimate in spark plug technology and performance from the industry leaderThe iridium electrode is 25% smaller than a platinum electrode, and it's just 1/4 the size of a conventional nickel electrode