Features:

• For the repair and service of stripped spark plug holes in aluminium cylinder heads
• Solid steel inserts replace damaged threads and eliminate the possibility of “coil wind out”
• Manufactured from drop forged heat treated steel for maximum service life and durability
• Installation:
• Carefully tap out the damaged thread using the tap supplied. The repaired thread will enable the screw insertion of one of the above steel inserts depending on length
• Note: Tool to be used by a trained professional to avoid engine damage
• Diameter: 18 mm
• Contents: One 18mm Tap , one of each insert - 11, 13, 16, 21 mm