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I just put a set of factory flaps on my 01 X Limited. I had to drill one hole for each into the plastic inner fender. The other holes all lined up with factory holes. Because the Limited has the ground affects the only modification I had to make was to trim a small square opening into the wheel well trim so that the metal nut would slip on far enough to line up with the hole in the flap. By the way - bought the 4 flaps right from ford dealer and paid approx. $34 for each set. Good Luck.
Yes, at least on the Husky flaps you need to drill holes as they only use one existing hole. The factory molded flaps I beleive are exactly the same. You need to drill 2 holes on the edge of the metal and one in the plastic wheel well lining. I usually put silicone sealer on the self cutting screws before i put them into the sheet metal. Most important of all, dont forget to put rock chip tape or some such to stop direct contact between mud guard and paint.
[updated:LAST EDITED ON 03-Jan-03 AT 02:54 AM (EST)]I say no drilling...
In Oct of 2001 I installed Ford mudflaps (purchased at the dealer) on my 2001 4x4 Superduty and they did not require any drilling. All holes were there and it only took 20 mins to do all 4 wheel wells.
Yes, but just in the plastic. I installed the Ford (from the dealership) mudflaps front and rear on mine and my fathers SD's and each one required one hole in the plastic inner fender.
Edmo, I don't know how you got around that, did you just leave that step out? Just wondering.
Bozeman, on my 00 the spacer fit fine, but on my fathers 02 I had to shorten it to make it fit correctly. I think it's there to keep the mudflap snug against the truck?
Also, Ford changed them a little since I bought my first set. On the older fronts, the Ford emblem is raised in the plastic and the newer ones have it just painted on. On the newer rears, they supplied a extra bracket to help hold them on. Looks like a good idea but I've never had any problems with my older ones. BTW I'm referring to the factory molded (front) and the dually with aluminum diamond plate insert(rear).
>Yes, you do. You also tend to have to drill at an angle
>since the drill doesn't fit with the tire in the way.
>
When you drill the plastic inner fender liner,turn the steering wheel to give you extra clearance.Also,a right angle drill can also come in handy for this.
>Has anyone figured out how that spacer thing is supposed to
>work on the front mudflaps? I gave up, my mudflaps are
>angled in. :-)
I shortened mine some and also cut it on an angle to match the contour of the plastic inner fender liner.