- Repairs damaged 14mm spark plug threads
- Open spark plug hole with reamer/tap. Screw insert onto spark plug. Use spark plug socket to install spark plug and insert. Remove spark plug and check that insert is properly seated.
- Set includes 1 each of 4 inserts (3/8in, 7/16in, 1/2in, and 3/4in reach) and thread locking compound.
- Tap is designed for aluminum heads only.
- Caution: Wear safety goggles.