Looking to spice up your OEM 2005 Mustang rims? Does it look like something is missing on your OEM rims but can't figure out what it is? Then I have the right thing for you. All jokes aside, I modeled and printed the center cap “spinners” from the 2005 mustang stock rims. I did not want to pay $30 for knockoffs or the $200 ones from Ford so I made my own. 

For people looking to print this for non Ford Wheels: Ford says their snap in center caps are “2.262 inches”  or “2.54 inches” for the snap lock in. It should fit in any wheels with that center. 

Before and After: pictures are 3 - 5 (the before is just an image of new rims, but you get the idea)

Ideal Materials

• Spinner - print in any material besides TPU (Mine is PLA+)
• Center Cap - Best results printed in nylon for a stiff but small flex for a good fit. PLA+, PET, PETG, or ABS would be good, just be careful when installing to not break any mounting pegs that go into the hub. 
• Optional: Print “Spinner” in Silver PLA if you don't want to paint it, it doesn't blend in as well as painted, but it works. 

Tips for installation 

• It many need some persuasion to fit the printed center cap in the center of the hub on the wheel as it was modeled to be a tight fit so it wouldn't fall out while driving so I used a rubber mallet to lightly tap it in place. Be very careful doing this if you do not intend on printing in nylon 
• The locking mechanism that combines the "Center Cap" piece to the “Spinner” piece should be a tight enough fit to stay on. If it's too lose you may need to reprint but it should be fine. I tested them for a couple days on my car and they haven't gone anywhere

Print Settings

• Printer: Ender 3 V2 with Spider v3 full metal hotend, dual gear extruder and PEI build Plate and Lulz Bot Taz for nylon (not that this matters)
• I used the preset profiles from Prusa for my print temps and speeds 
• Spinner Layer Height: 0.16 mm
• Center Cap Layer Height: 0.20mm
• See the screenshot from PrusaSlicer for proper support placement and blocking (pictures 6-8) 
• Supports: on build plate only

After Printing to get a factory looking finish

• Sand with 220 grit sandpaper for a really smooth finish
• If printing out of Dark material: Base coat with primer or white spray paint 
• Spray Paint with a close matching silver (I used Rust-Oleum Bright Coat Metallic Finish)
• Do a few coats of the paint for protection (with the paint I used, a clear coat didn't apply right and had to strip the paint and restart. 
• Optional: find an emblem sticker to put in the center cap (the model accounted for it)

The 3mf and STEP files will also be in this included so you can remix this design or edit it to make it better.