This 730 hp Audi RS6 is another new project from Litchfield. Litchfield is a British supercar tuner decided they want to part and provide tuning package for the Audi RS6. They have replaced factory airbox with homemade carbon fiber airbox, Akrapovic exhaust system with custom downpipes, Goodridge brakeline, new suspension settings and remapping its engine management system. This Stage 3 tuning package available for £4,939. Litchfield tuning package for Audi RS6 starts from £600 for Stage 1.