The 997 GT3 RS is the second generation of the Porsche 911 GT3 RS, a lighter and more track-oriented model variant to the 911 GT3. Designed to homologate the GT3-RSR racing car, the GT3 RS comes with racing modifications, widened rear fenders for a wider rear track and a carbon-fiber rear wing. In 2015, the 991 GT3 RS was introduced to succeed the 997 GT3 RS and the latter's 4.0 liter variant, the Porsche 911 GT3 RS 4.0.
RS stands for “rennsport” in German which translates to “racing sport”. The differences between the 911 GT3 RS and the GT3 are slight but the RS model provides the closest thing available to an actual cup car. Some carbon-fiber components, such as the hood and rear wing, and lighter glass give the RS a lift in the weight category and the 1.7-inch wider rear-end give it increased directional stability and better lateral grip. The gear ratios are slightly shorter for blasting out of corners and optimizing the 8,400 RPM redline. The beautiful and powerful resonance of this engine communicates with the driver from low RPM growl to a wailing roar at peak. While the RS only delivers the same horsepower than the GT3, the way it is transferred to the pavement will result is quicker lap times and shave increments off the car’s quarter-mile stats.