Spark Plug Thread Repair Kit for Damaged Threads: This kit is designed to restore damaged spark plug threads in a cylinder head and is suitable for gasoline engines, diesel engines, and generators when the selected thread size matches your application
11 Piece Spark Plug Repair Kit: Each set includes 10 thread inserts and 1 thread tap for spark plug thread restoration work; useful for buyers looking for a practical insert and tap set for engine repair tasks
Spark Plug Helicoil Kit with Durable Materials: The inserts are made of stainless steel and the tap is made of high speed steel, making this spark plug helicoil kit suitable for repeated repair use when used correctly and cleaned after the job
Check Thread Size Before Buying: This spark plug rethread kit is sold by thread size variant, so please confirm whether your engine uses M12x1.25 or M14x1.25 spark plug threads and confirm there is enough access depth to run the tap straight in the spark plug well
Use Carefully and Clear Metal Chips: This stripped spark plug repair kit should be used only after cleaning the spark plug hole first; tap slowly while backing out to clear chips, remove metal debris from the cylinder head area, then install the insert and spark plug according to engine specs