Porsche launched the RS version of the 991 GT3 at the Geneva Motor Show in 2015.
Compared to the 991 GT3, the front fenders are now equipped with louvers above the wheels and the rear fenders now include intakes taken from the 911 Turbo, rather than an intake below the rear wing.
The roof is made from magnesium.
The interior includes full bucket seats (based on the carbon seats of the 918 Spyder), carbon-fibre inserts, lightweight door handles and the Club Sport Package as standard (a bolted-on roll cage behind the front seats, preparation for a battery master switch, and a six-point safety harness for the driver and fire extinguisher with mounting bracket).

The 3.8-litre unit found in the 991 GT3 is replaced with a 4.0-litre unit generating a maximum power output of 500 PS (368 kW; 493 hp) and 339 lb⋅ft (460 N⋅m) of torque.
The transmission is PDK only.
The car is able to accelerate from 0-100 km/h (62 mph) in 3.3 seconds (0.6 seconds quicker than the 997 GT3 RS 4.0) and to 200 km/h (0–124 mph) in 10.9 seconds.
The 991 GT3 RS also comes with functions such as declutching by "paddle neutral" — comparable to pressing the clutch with a conventional manual gearbox – and a Pit Speed limiter button.
As with the 991 GT3, there is rear-axle steering and Porsche Torque Vectoring Plus system with fully variable rear axle differential lock.
Porsche launched the RS version of the 991 GT3 at the Geneva Motor Show in 2015. Compared to the 991 GT3, the front fenders are now equipped with louvers above the wheels and the rear fenders now include intakes taken from the 911 Turbo, rather than an intake below the rear wing. The roof is made from magnesium. The interior includes full bucket seats (based on the carbon seats of the 918 Spyder), carbon-fibre inserts, lightweight door handles and the Club Sport Package as standard (a bolted-on roll cage behind the front seats, preparation for a battery master switch, and a six-point safety harness for the driver and fire extinguisher with mounting bracket).
The 3.8-litre unit found in the 991 GT3 is replaced with a 4.0-litre unit generating a maximum power output of 500 PS (368 kW; 493 hp) and 339 lb⋅ft (460 N⋅m) of torque. The transmission is PDK only. The car is able to accelerate from 0-100 km/h (62 mph) in 3.3 seconds (0.6 seconds quicker than the 997 GT3 RS 4.0) and to 200 km/h (0–124 mph) in 10.9 seconds. The 991 GT3 RS also comes with functions such as declutching by "paddle neutral" — comparable to pressing the clutch with a conventional manual gearbox – and a Pit Speed limiter button. As with the 991 GT3, there is rear-axle steering and Porsche Torque Vectoring Plus system with fully variable rear axle differential lock.
Porsche 991