Largest Ford Spark Plug Thread Repair Kit - Biggest Possible!
Using the same installation and tooling style as the 38900, the 389XL features larger, thicker inserts. This allows you to repair cylinder heads that have had previous repairs fail, making the hole larger. It's the largest kit on the market, offering the best repair solution at an economical price. https://www.wiseautotools.com/win-too...