Akrapovic Street Legal 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. The Akrapovic EC Type approval Racing and Evolution systems were developed to complement the racing character of the S 1000 RR. The Evolution system is made entirely of our exclusive high grade titanium while the Racing system uses stainless steel header tubes and link pipe. We offer titanium or carbon-fiber muffler for each combination. Both systems are EC Type approval and are equipped with hi-flow catalytic converter and valve. Street legal systems feature the same characteristics as the track systems but are equipped with hi flow catalytic converters and exhaust valves Evolution System is made entirely of exclusive high grade titanium Racing System uses stainless steel header tubes and link pipe Power Torque The power increase with the Akrapovic system is substantial, and can be seen from 5500 rpm right to the top of the range. At 13300 rpm we measured 189.4 HP, with a max. power increase of 9.1 HP at 8200 rpm. The systems effect on the torque and power curve is huge and strongest at midrange rpm. View Graph This is an EC Approved Exhaust System. Hexagonal mufflers feature carbon fiber outlet cap 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. The Akrapovic street legal Racing and Evolution systems were developed to complement the racing character of the S 1000 RR. We offer titanium or carbon-fiber muffler for each combination. Both systems are street legal and are equipped with hi-flow catalytic converter and valve. NOTE Please check local laws before purchasing. Some modifications may be prohibited in some states.