CalVan Tools 38900 Two Valve Ford Triton Tool Kit - Foolproof Repair System, Spark Plug Thread Repair Kit. Tools and Equipment Designed to aide in repairing Two Valve Ford Modular Cylinders Heads. A quality, foolproof repair system that is cost effective and fast High quality oversized steel alloy insert will repair other inserts that fail and has no ill effects from heat transfer Total labor time as short as 25 mins, For use on 4.6L, 5.4L and 6.8 V-10 Ford Triton Two Valve Engines For use on years 1996 to 2003, Part No. 389-100 Replacement Inserts nsert size: m14-1.25, Patented Ford spark plug insert installer designed to aide in repairing ford modular cylinder heads Quality, foolproof repair system that is fast, cost effective and simple to use Used to repair damaged heads from blown spark plugs, with an alloy steel insert Patented insert is oversized, heavy duty and can be used to replace previously installed inserts that have failed Includes six inserts; saves both time and money