Performance Tool Spark Plug Thread Repair Kit W86904 Use With Drill Bit Size 9/16 Inch; M14 x 1.25 Thread Size Performance Tool $41.81
Revive Your Aluminum Heads with Performance Tool Spark Plug Thread Repair Kit | M14 x 1.25 Thread Size Performance Tool $35.89
Helicoil Spark Plug Thread Repair Kit 5334-14 Sav-A-Thread; Used For Aluminum Cylinder Heads; With Three Inserts And One Tap Helicoil $64.30
