Well not sure how many people will use this. We used 20ga steel for this. First you need a measurement for the opening mazdas front are 35" from firewall to front were it goes flat. The width will depend on you we went 7" wide and it looks good. Ok when you do you layout for cutting make sure you add 3/4" on the long side for the bend so we went 7 3/4"
Then bend the 3/4 over 90 degrees Now i know most people dont have a brake so when you make your cut add 2" so it will bend better, then use angle iron or some other flat steel put the tin between and clamp it then bend the 90 deg that you need then cut the extra 2" off. Now we tried 1" between bends and that wasnt enough so on the outside of the bend make a mark every 1/2" . We made a quick tool to speed things up and make it so one person could do it. Now notice how the end is round thats so it wont get to close to the bend and leave a mark when clamping. The bottom has a 1/2" slot at the bottom for the top to set into. If using the tool then clamp down every mark and watch it start to shape. See how the ends round to keep away from the bend Ok for you guys that dont want to make the super tool here is another way to do it its just harder to make them all the same and takes 2 people. Take a block of wood dig a small hole in the end Or you could make it from steel to make it last. Then take a dull chisel or flat head (with tip broke off) and hammer and tap at all the marks . I then put the fender in the truck for fitting you can bend it a little more or take some out to make it fit just right, make sure you get it all set before moving on. Now trace out the fender on some 20ga for the lip i went right on the top then the inside i went 1/4" more to cover more. Then cut it out and place it over the fender kepping it down from the bend just a little so when you weld you have room I tacked it with very small tacks untill allmost the whole thing was welded also very small tacks on the inside were the metal touched. Then clean up the welds When you get done with the trim it might need a little finish up with the hammer to make it all straight but dont beat the dimples out it will take the bend away and warp the fender. I will add a few little things to this as people ask so check this page for updates.Created By: dirtracer14