Audi RS6 by B&B

When the RS6 was released it was considered that Audi's power war addiction had gone to their head, the 5.0-liter FSI twin turbo V10 monster found under the hood pumps out a massive 580bhp, but judging by the array of tuning kits coming out for the model, the engine is capable of far more. One of the first to come out was an effort by MTM which brought power output to 656bhp and 579lb-ft (785Nm)