For first time Approved repairs on Chrysler M12x1.5 head bolts that have a Starting thread depth of 21mm. The distance from 1 head bolt to the next would be 106mm or 4.172" inches Kit includes all the tools and 16 inserts of the p/n 12159 NOTE: The standard Universal head bolt kit P/n 4800 will NOT work for this application because the P/n 8313 uses a wider fixture pattern to fit this 106mm head bolt distance. YOU CAN optionally use the P/n 4800-VER-77 which includes the wider fixture plate.    .Ins.