APR is pleased to present the world's first ECU Upgrade for the Audi C6 A6 3.0 TFSI. The APR Stage I ECU Upgrade improves acceleration significantly over stock by producing nearly 100 HP more than stock at all four wheels. Gauges were recorded in stock mode with speed limiter removed and APR Stage I mode. Runs were testing in Drive, Sport and Manual mode. All run were conducted from the same starting point. 93 octane fuel was used.