Akrapovic Exhaust System BMW S1000RR Akrapovic Racing and Evolution systems are designed for riders who demand maximum performance from their motorcycle. Both systems are significantly lighter, if compared to the stock exhaust system and feature exceptional production quality, hi-tech materials and of course increased engine performance combined with pure racing sound output. Power Torque The power increase with the Akrapovic exhaust system is substantial, and can be seen from 7000 rpm right to the top of the range. At 13270 rpm we measured 191.30 HP, with a max. power increase of 11.15 HP at 8450 rpm. The systems effect on the torque and power curve is huge and strongest at midrange rpm. The main increase starts at around 4500 rpm and continues right into the over-rev range. All this will help you shave lap times and result in a much smoother ride. View Graph The Akrapovic Racing and Evolution systems were developed to complement the racing character of the S1000 RR. Evolution System is made entirely of exclusive high grade titanium Racing System uses stainless steel header tubes and link pipe Sporty lightweight conical muffler perfectly fits the lines of the bike and adds a clean racing images Muffler outer sleeve is made of titanium, end cap is made of carbon fiber Significantly lighter than stock pipe Hexagonal mufflers feature a carbon fiber outlet cap to match the design of each bike NOTE Please check local laws before purchasing. Some modifications may be prohibited in some states.