There is a new tuning program available for the Audi S4 by STaSIS tuning firm, and the program is available in two choices for the owners - Touring Edition and Challenge Edition. The first one is the STaSIS Audi S4 Touring Edition which comes with 410-horsepower and 370 lb ft of torque. The tuning program adds a new exhaust system, bigger brakes with high-performance street pads, stainless steel lines and 20-inch heels. It also features a lowered suspension and anti-roll bar kit.

The STaSIS Audi S4 Challenge Edition has everything that the Touring offers, but more. Included in the Challenge Edition are Ohlins SL dampers, new brakes with 6-piston Alcon monobloc calipers, stainless steel brake lines and high-performance pads and a high-bias center differential for the manual gearbox version. Both of these great packages start at £12,500 ($20,208).