Porsche 997 Race Car with a Twin-Turbo 3.9 L Flat-Six Porsche 997 race car built by RS Tuning with a twin-turbo 3.9 L flat-six " data-image-caption="" data-medium-file="https://engineswapdepot.com/wp-content/uploads/2021/09/Porsche-997-race-car-with-a-t...