The mounting pillars are bolted to the splitter. The splitter is made of many plys of carbon laminated with thermoplastic instead of resin. No cheap fiberglass filler here! This makes the splitter very impact and abrasion resistant compared to a typical carbon and resin layup and perfect for a splitter that could contact the ground and other hazards.
The airdam is bolted to the bumper fascia. The airdam fills the gap between the facia and the splitter.
Next the splitter is bolted through the airdam into the fascia via the mounting pillars. This forms a stiff boxed structure that is surprisingly strong.
Two of the mounting pillars bolt directly into the steel bumper support and take a lot of the aero load off the front fascia.
The completed front bumper assembly is now ready to bolt back onto the car.
The two large pillars bolt into the bumper support with these steel inserts. These two mounts give the splitter plenty of support.