RSS - CarbonAero Kit # 242 for 991 GT3.1 (does not fit RS). Includes REAR WING EXTENSION GURNEY FLAP. Aesthetically pleasing and aggressive in appearance, Canards and Gurney Flaps have a functional purpose with direct benefits on street and motorsports applications. Designed with the latest CAD technology, constructed to exacting standards with pre-preg 2×2 Carbon Fibre Twill, finished in a high gloss clear coat with UV inhibitors, adhere with 3M VHB tape for easy application and removal, and are 100% Manufactured in USA. Components are are of the highest quality and are guaranteed to fit.• Produce down force by deflecting oncoming air upward resulting in a net down force on the rear of the vehicle. Can be used to balance and tune front to rear down force levels.