RSS - CarbonAero Kit # 252 for 981 GT4. Includes REAR WING EXTENSION. Aesthetically pleasing and aggressive in appearance, WING EXTENSIONS 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 Matte 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.