HIGH-VOLTAGE SPARK PLUG SETS
The best plugs for high-mileage engines! Boosts starting voltage to deliver a stronger, hotter spark-you will enjoy trouble-free starts even on cold mornings. Hotter spark also prevents soil build-up and fouling to give you better performance, acceleration and fuel economy. Thermoreactor disc delivers 40% more spark power to tip of plug when cold. Aluminum oxide insulator. Super-hard electrode won't burn.