AllStar Performance Semi-Truck Spark Plug & Ignition Tools

Universal M14 Spark Plug Indexing Tool by AllStar Performance®. Indexing positions the ground strap of the spark plug properly for best piston dome clearance and unshrouds the electrode for a more even burn and possible gains of 5-15...

Universal Spark Plug Gap Tool by AllStar Performance®. Tool properly cradles the spark plug to consistently set plug gaps using a standard feeler gauge. Insert plug into holder, place desired thickness of feeler gauge between ground...