If you mount the Polks on the provided plastic ring, one hole of that ring can screw into the factory mounts. You can use the clips they provide to go into the other 2 factory mounting holes and tuck the bottom of the "V" of the clip (the end opposite the screw holes) inbetween the speaker and the plastic ring. Just don't tighten down really hard when you mount the speaker on the ring or you can't get that "back end" of the clips between the plastic and the speaker. (If you really want to be extra secure, you can add a dab of epoxy to the clip/ plastic ring interface.) Mounted this way, mine have held up with nary a rattle for at least 2500 miles over bumpy roads. Wdhitch is right, it only sounds difficult to take off the door panels. It's really not that hard to do.