We have Perma-Coil M18 X 1.50 Spark Plug Port/ Oxygen Sensor Repair Kit with Product Detail 100% Made in U.S.A.! These kits are second to none! Restores threads to original dimesions so that original spark plug can be used. No drill bit required! Kit Includes: METAL installing tool, prewinder, tap, 6 inserts & instructions. This kit can also be used to repair Oxygen Sensor ports. . The "Perma-Coil M18 X 1.50 Spark Plug Port/ Oxygen Sensor Repair Kit" is best product for you. We recommended Perma-Coil M18 X 1.50 Spark Plug Port/ Oxygen Sensor Repair Kit