With the addition of a gurney flap, the "High-Efficiency is transformed into "High Downforce version; a trunk spoiler optimized for racing use. The High Downforce version includes the efficiency wing and the attachable gurney flap (which can be installed at the race track and removed for the drive home as desired using VHB double sided tape). Using the latest in aero simulation and CAD technology, we engineered a spoiler that looks great, is simple to install (no drilling), doesnt impede the rearward visibility of a driver, and most-importantly, reduces overall drag!
The gurney flaps shape, in combination with the base spoilers highly-efficient shape creates a dramatic improvement in performance. After installation of the gurney, increases of 160.9% in rear downforce are seen, which represent an improvement of 464% over the OEM spoiler available on the Performance trim level. In addition to the dramatic increases in downforce, the design actually reduces Model 3s total vehicle drag by 0.1% versus a vehicle equipped without the OEM Performance rear spoiler. Patent pending.