2103-0418 - AUTOLITE Spark Plug - XS4164 XS4164

Spark Plug - XS4164
More focused ignition to prevent fouling than leading standard plug, .6mm finewire design with Sport V-trim ground electrode engineered to offer improved ignitability and durability over a standard plug, Up to 26% quicker starts than leading standard plug, More horsepower and better fuel efficiency than standard plug, Meets or exceeds OEM design