Only 3 of the 6 bolts will get tight. One of the bolts looks like it has the remnants of a helicoil or something of that nature. I've seen some comments that say the cover is not needed. I say bull to that. The cover serves as a direct hold down for the coils and a element cover. The rubber wires and boots wouldn't last very long subjected to dirt, road grime and moisture. I'm all for the helicoil method of securing. Without the bolts holding the coils down they seem loose.

Rick Potter