The kit should contain a special drill bit, and a special tap that allows the heli coil to be threaded in and the inner threads of the heli coil will then match your bolt. Make sure you buy a complete kit, not just the coils and insert tool. You will need the drill bit, tap and the heli coil insertion tool along with the heli coil inserts. Take precations when drilling to prevent any chips from entering the intake manifold. Instructions will be included in the kit. Very easy to do.