Bite the bullet and get the OEM. I installed a 777 conversion kit (all aftermarket pieces are molded by the same Chinese source, last image) on my son's 2022 GT and the lower splitter is a single layer of flimsy polypropylene that will chip or split on the slightest bump. We had to swap out his PP1 fender liners and undertray to a base Mustang to line up with the upper splitter but the lower splitter nests into the upper splitter same as a real Mach 1. Try ordering the real deal from a local dealer if they offer an on-line discount service and get approximately 30% off and free pick-up. My local dealer makes it tricky to find because you can't access it from their main web-site but another dealer might advertise a discounted price and you can go to that web-page and change the dealer to a local dealer and the price will be the same or similar. FordParts.com used to offer great discounts and free shipping or pick-up through any dealer but those days are long gone.