The rear wing is great for customers looking for a large bump in rear downforce. The Verus UCW wing profile was developed in CFD and refined in the wind tunnel. The airfoil produces efficient downforce on the 992 GT3.
The bottom surface is where the majority of the downforce is generated. This low pressure pulls the car downward. The top surface still produces downforce, but not like the bottom surface.
The Cp (coefficient of pressure) does not go above 0.7 on the top, but the bottom goes below -1. In other words, the bottom surface is working the wing harder.
This is great as the 992 GT3 has a top mount from the factory. The wing bolts on like stock and is produced from 2x2 twill, pre-preg carbon fiber.