They increase downforce at the front axle.
The chassis of the 911 GT3 RS has been tuned for maximum driving dynamics and precision. The front spoiler lip, which extends nearly to the road, and the large rear wing reinforce its dominant look. In response to a new FIA race car rule, which demanded they more closely resemble standard production vehicles, the displacement of the RS 60 developed on the basis of the 718 RSK was not only increased to 1,600 cc, it also gained some rather unusual features for a race car, namely a larger windshield, functional hood and luggage compartment located at the rear, behind the four-cam four-cylinder engine which now produced 160 hp. The engine, which has the largest displacement and most power of any naturally aspirated engine with direct fuel injection in the 911 family, accelerates the high-performance sports car from zero to 100 km/h in 3.