ABT Sportsline, the Audi dedicated tuning specialist, decided to take a different approach on the current RS4 Avant, the most powerfull iteration of its medium segment estate model.
 
Although the RS4 is now powered by a 4.2l V8 with 450 hp (331 kW) and accelerates faster than previous generations, one essential number hasn’t changed: its top speed of 250 km/h. That’s because of the factory electronic speed limiter. No problem for ABT, which can remove the electronic speed limiter increasing the top speed to approximately 290 km/h (180 mph).  
 
The most important feature comes from the optionally available stainless-steel exhaust system, tuned to be more musical than the standard one. From the catalytic converter, ABT Sportsline replaces the system with optimised components.
 
ABT uses one size larger alloy wheels in its ABT DR design in 9 x 20 inches. They have gun metal finish and the spokes arranged like a turbine blade. To emphasize the car’s muscular appearance, the Bavarian car tuner also installs 25mm wheel spacers on each side. And finally there is the ABT boot mat and the matching set of floor mats that customize the interior.

Source: Audi