2004-2008 OEM mudflaps DO fit our trucks
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Joined: May 2005
Posts: 94
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From: Stone Park IL
2004-2008 OEM mudflaps DO fit our trucks
Well I've been looking for a set of No Drill mud flaps for my new F150 and all the 2011 sets I found were $91 shipped me being a cheap a$$ was looking for a better deal for just 4 pieces of plastic and refused to drill a hole in my new truck I found a set of mudflaps for a 2004-2008 ($42 shipped) Ford P/N (4L3Z 16A550GAA) The fronts fit perfectally no modifcation needed. 
The rears well that was a differnt story but not a big deal here are the tools and hardware needed.
Bench Grinder
Drill with 5/16 drill bit.
6 1" 1/4-20 Carrige bolts (zinc plated or Stainless Prefered)
2 1/4-20 Fender washers
6 Ny-Loc 1/4-20 nuts
7/16 Open end Wrench
Pencil
10mm wrench
Trim Remover or side cutters.
After you remove the 2 fir tree clips per side and one 10mm stud and clip nut where the glap goes you will notice that the flap follows the lines of the rear fender pretty nicely but 2 of the 3 holes don't line up. Align the one hole that does line up and mark the flap. Remove the flap and drill the 2 holes. On the bottom hole only drill through the 1st wall and not the second wall becuase then your drill mark will be visible. (Not a big deal unless your **** like me)
You will then see that there is not enough room to fit the carrige bolt head in the bottom of the flap because of the surrounding wall around the hole that was just drilled. So I tool the carige bolt over to the grinder and made the round head of the carrige bolt fit into the opening basically grinded off 270° of the head to fit.
Now assembly.
1st put the carrige bolt into the hole in the bottom of the flap and put the flap onto the truck then place the washer and nut on (do not tighten yet). Then put the other 2 carrige bolts into the holes with nuts only (not enough room for a washer. Then tighten up all 3 nuts and your done. Continue on the other side.
The whole thing takes maybe 40 mins. Took me a little longer to figure it all out.
I know some people would rather just spend the extra $40 for the correct flaps but I like to be custom and make my own stuff. If anybody is interested I'll post up some pictures later.
The rears well that was a differnt story but not a big deal here are the tools and hardware needed.
Bench Grinder
Drill with 5/16 drill bit.
6 1" 1/4-20 Carrige bolts (zinc plated or Stainless Prefered)
2 1/4-20 Fender washers
6 Ny-Loc 1/4-20 nuts
7/16 Open end Wrench
Pencil
10mm wrench
Trim Remover or side cutters.
After you remove the 2 fir tree clips per side and one 10mm stud and clip nut where the glap goes you will notice that the flap follows the lines of the rear fender pretty nicely but 2 of the 3 holes don't line up. Align the one hole that does line up and mark the flap. Remove the flap and drill the 2 holes. On the bottom hole only drill through the 1st wall and not the second wall becuase then your drill mark will be visible. (Not a big deal unless your **** like me)
You will then see that there is not enough room to fit the carrige bolt head in the bottom of the flap because of the surrounding wall around the hole that was just drilled. So I tool the carige bolt over to the grinder and made the round head of the carrige bolt fit into the opening basically grinded off 270° of the head to fit.
Now assembly.
1st put the carrige bolt into the hole in the bottom of the flap and put the flap onto the truck then place the washer and nut on (do not tighten yet). Then put the other 2 carrige bolts into the holes with nuts only (not enough room for a washer. Then tighten up all 3 nuts and your done. Continue on the other side.
The whole thing takes maybe 40 mins. Took me a little longer to figure it all out.
I know some people would rather just spend the extra $40 for the correct flaps but I like to be custom and make my own stuff. If anybody is interested I'll post up some pictures later.
