Powerbuilt 14mm Spart Plug Thread Repair Set, 14mm Cylinder Head Rethreaded Kit, Rethreads Damaged 14 Millimeter Spark Plug Holes, 4 Inserts: Two 7/16", one 5/8" and one 13/16", M14 x 1.25-648421
Rethreads damaged 14 millimeter spark plug holes in aluminum heads. Includes tap and 4 inserts: two 7/16", one 5/8" and one 13/16". Meets or exceeds ANSI standards. Lifetime warranty.