Well, if you're like me, you think you can do all of the mechanical work on your car yourself, LOL! I recently replaced my intercooler myself, patted myself on the back that it went so well, although longer time than most, but I am nearing 73. I checked everything over yesterday after reading a couple of posts about the push pins in the fender wells and I found that I had two missing from each side! Wow, I was shocked, my first thought was that at least I didn't lose an inner fender well. Today I went to Ford to get replacements and found out why we get it wrong, there are six push/pull pins in each fender well, and for whatever reason, Ford decided that there should be four different sizes and part numbers for the pins, even the ones in a GT are a different part number than those in the ecoboost believe it or not. I bought all of the part numbers they had in stock, noting from the parts book where each was supposed to go. When it came to actually installing them I found that the parts book was wrong on two of them so I used my calipers to check the hole size and then used it to check the new pins to be sure I was putting the correct sized assembly in each hole. Luckily I got them right and I feel comfortable that I won't lose an inner fender at 100mph and ruin it. So just a note to all, be sure to mark the spot that you remove each push pin from so that you put that exact one goes back where it came from, even the parts people couldn't believe the differences in these push pins! If you use the wrong one in the wrong hole the wind at speed will push the fenderwell hard enough to push the pin out and eventually you will destroy the inner fender well when it starts contacting the tire!! I learned the easy way the way I figure it, or the lucky way! In either case, be careful. And thanks to those you who helped me with the intercooler change.