How To Shift Like a Pro! 1050HP Audi S4 C4 GTX4202R Turbo Acceleration & Sound Drag & Track by turboandstance - July 26, 2018May 10, 2019 Whether you’re a weekend warrior or a top-notch criterium racer, shifting your gears efficiently can make a world of difference in your performance car. This video features a 1050HP Audi S4 C4 GTX4202R Turbo tuned by BS CarPerformance in action on the 1/2 Mile Race in Germany. The driver had a very unique way to shift gears.. Leave a comment