This is a number I copied from a different post. This for the front liner in the rear tire well. F81Z-9929370-AA need (2) If you do a search you should find several posts, I know many have complained about this topic. I haven't used the number yet, probably going to dealer tomorrow and order some along with the liner for the front wheel well. I thought of trying the salvage yard but with below zero temps and low odds of there being a late model super duty in a yard around here, I'll go for the new ones.
I had rear fender liners put on my 05 F350 yesterday. They were not at all what I expected. I thought they would cover the entire inner fender area and protect the box. They turned out the be a little black plastic piece just above and behind the mup flaps. Might help a bit with stones etc. kicked back but they hardly seem worthwhile. I wonder if there is something made that would protect the whole area?
Also had the hood liner put in. It didn't significantly reduce engine noise as others had predicted. Was trying reduce noise to make my wife happier. Its not worthwhile doing either.
I just bought a set (4) for my new 05. They are just plastic strips, one for the front & one for the back (on each side). Cost was $130! Seems like a rip off to me. I don't understand why ford would not provide this for new trucks. Especially upscale models like the Lariat & King Ranch. If you ever drive through mud without fender liners it's going to add alot of weight to your truck and be a real pain in the butt to clean!
I don't have the part # with me but I'll get it for you. I haven't put them in yet as my new truck is still on order.
Not really any reason not to, but it depends on what you're trying to accomplish.
-Doubt it will have any effect on noise, unless you're used to riding in the bed of the truck.
-New and later model trucks have zinc coating then painted beds, inside/underside, will most likely last well beyond original purchaser's use.
Unless you really abuse it big time.
-Sprayed on coatings will still only cover so much. Will not prevent flow of materials (water, dirt, rocks, etc) from being thrown up and around the cavities between the fender and bottom of bed, or to the backside of truck behind bumper.
-But spray on will protect what ever surface it is sprayed on, just a matter of whether it's a worthwhile investment is up to you????