It's a custom-made one my friend and I spent time on back in 2015, then we eventually trimmed it back due it being over kill. It was about 4 inches extended from the already lipped Stillen bumper, but now its about 2 and some change inches. It's an aluminum sheet that is cut into more of a "half splitter" (meaning it only goes on the underside of the bumper, not the full under-tray). The rods are connected to the factory crash bar, so while it's not perfect, it is more than safe and not coming off at speed. I plan on getting the honeycomb carbon and cutting out a revised design that will replace the tray and have a service port. The dive planes were more of a joke as I took My friend's daughter's scissors and free-handed the template out of cardboard.
those no longer exist as i totally F-ed them up pulling into the garage one day.
Side profile to show the short length
Side note, I hate installing vinyl. Easily the most frustrating install i've done on the car.