New Heli-Coil Spark Plug Thread Repair Kit. The professionals choice for virtually all U.S. and foreign vehicle manufactures. This set contain repairs for the most commonly used thread sizes. The repair kit inserts are used to repair tapped holes which have been stripped or damaged due to wear, corrosion and over-torque. They are available in M12 and M14 sizes for any engine. Each spark plug thread repair kit contains a piloted reamer/tap (no drilling necessary), an installation tool, and several insert lengths to accommodate all spark plug reaches.

•  Heli-Coil inserts are used to repair tapped holes which have been stripped or damaged due to wear, corrosion, and over-torque. They are available in M12 and M14 sizes and for any engine.

•  Heli-Coils are the preferred method of repair specified by virtually all US and foreign vehicle manufacturers.

•  Each spark plug thread repair kit contains a piloted reamer/tap (no drilling necessary), an installation tool, and several insert lengths to accommodate all spark plug reaches.