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They are the real deal Matt, I ordered mine through them and they were out of stock so they directed me to gefracing.com their supplier. I have them sitting in my trunk at the moment and they are the M-4209-G410A. So call them first because they took a week to let me know they were out of stock before directing me to gefracing.com. Just a heads up everyone. Call First!!
They came right in a ford racing box with the part number stamped on the outside. They just slapped the UPS label right on the box. Part number M 4209 G410A. It's taken me about 2 months to get all the parts. But I got the 410's and the diff girdle on sale for $150 each with free shipping. You just have to watch their website, also I bought the non IRS gear install kit for $100. It's probably way more than I need, but why worry about reusing parts when I can get them all new.