My son works at a Ford dealer in Indiana, and he borrowed there kit it is the $100 one It took about 1/2 hr. to do the job big problem is getting back to the plug bore ( third 1 back on Dr side.). Standing on a plastic bucket to reach up inside compartment. Not realy a bad job but certianly a pain in the butt. The head seamed to be very soft aluminum, I lock tited the incert in. Should be OK