Autolite has over 100 years of engineering experience and has sold over 11 billion plugs. Designed and engineered in the USA, Autolite Double Platinum spark plugs feature platinum-to-platinum firing which virtually eliminates gap erosion, reduces misfires and increases durability of the plug. Consider upgrading to Autolite Iridium XP spark plugs for increased performance. Product Features:.6mm finewire design with Sport V-trim ground electrode- providing more horsepower than a standard plug and better fuel efficiency than a worn plugUp to 26% quicker engine starts than leading standard plug* - providing less battery/starter wear, and less kick starting effort required for Dirt BikesMore focused ignition to prevent fouling than leading standard plug - providing reliable starting in any season or weather conditionMeets or exceeds OE Design