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WiseAutoTools.com © Summary: The Time Sert 7220 is an M12x1.5 head bolt thread repair kit for fixing pulled threads in many Honda and Acura v-6 engines. The 4800 is a universal head bolt kit that works on any car that uses the M12x1.5 head bolt size because it can be used at different depths. This is why the 4800 kit is a better purchase in our opinion. Recently, Jeep and all other Chrysler vehicles that use the notorious 3.6 has made the 4800 kit much more common than we thought it ever would b …