by installing a special oversized insert INSIDE another insert. Qty 5 inserts of the Triple oversize and internal insert are included in this kit.
3/4 reach TAPER SEAT M14x1.25 BIG-SERT insert.
TRIPLE OVERSIZED JUMBO SPARK PLUG REPAIR KIT FOR F0RD
Where a previous repair has failed.
" STAND ALONE OVERSIZED REDUCER TO M14x1.25" For 3/4 Taper Sparkplug's LAST CHANCE REPAIR FOR THE FORD 4.6 / 5.4 heads. All the tools are included to repair the spark plug hole. The kit will repair holes as large as .730 inches by installing a special oversized insert that will accept our 3/4 reach TAPER SEAT M14x1.25 BIG-SERT insert. Ford spark plug triple oversized kit 5600 includes all the tools and inserts