Thread repair kit includes all the tools to install a final insert FLUSH to the surface in N0RTH STAR M11x1.5 head bolt. INSTRUCTIONS NOTE: Shorter head bolts NOT included order separate from FELPRO Felpro bolt p/n ES72170 for GM motor 98-2003 VIN 4 use the 5 short bolts there are 5 long bolts with a stud you do not use those.