I’m not happy with how I drilled the hole at the top of the passenger side IRS spindle and would like to buy a replacement matching the one that came with my MK4 complete kit.
I called Factory Five and learned that they get the spindle and hub as a kit from Ford Performance, M-5970-M. I then called Ford Performance who said they only sell the kit which includes both the IRS spindles and hubs. They suggested I order a replacement spindle through my local Ford Dealership. I did some on line research and found at least three part numbers for the 2015-2017 right side spindle (knuckle). The ones I found were FR3Z-5B758- with either a B, C or E after the last dash. I called Ford Performance back to ask which version was in their M-5970-M kit. The person I spoke with said it was the FR3Z-5B758-B. I ordered the spindle through a local Ford Dealership, using the FR3Z-5B758-B part number and paid for express shipping. (By now I had zero patience.)
The part Ford sold me was not an acceptable match for the spindle FFR supplied in my MK4 kit! While both pressed in bearings on the spindles FFR supplied are identical Ford parts those in the spindle supplied by my Ford dealer were not. One of the bearings in the spindle supplied by Ford was identical to those in the FFR spindle while the other was a poor quality unbranded bearing. I refused the spindle supplied by Ford and was able to get my money back. I’ll try to attach photos of the bearings in the FFR / FP spindles and the one in the spindle I purchased/refused.
Can anyone help me identify the correct part number for a right side knuckle matching the one in your M-5970-M kit? I understandB1B0A89A-EDBA-4356-A675-5F34B57E8CBB.jpg68B7C1EC-0FF0-4978-A632-77E339BE9535.jpgA81B97A7-69D9-481E-885A-1E04CEA06374.jpg the suffix codes B, C or E designate different models of 2015-2017 Mustang. The E one may come with a Shelby logo on it.