SureWerx H3660-10 JET Replacement Spark Plug Insert for H3660

Designed to aide in repairing spark plug threads damaged on Ford Triton Modular Engines - 1996-2003 - 4.6LT, 5.4LT, 6.8LT V-10. Becoming one of the most asked for repairs as these engine age. Repair damaged cylinder heads from spark plug thread erosion and shooting spark plugs out during operations with a patented "Alloy Steel Insert". Fool proof repair system that is fast, cost effective and simple to use