Akrapovic Racing Exhaust System Kawasaki Z1000 / Ninja 1000 2010-2012 Akrapovic's Racing System is designed for riders who demand maximum performance from their motorcycle. System is almost 10 kg lighter compared to the stock exhaust system and features exceptional production quality, hi-tech materials, and increased engine performance combined with pure racing sound output. The Racing System uses stainless steel header tubes and link pipe. We offer titanium or carbon-fiber mufflers. System is not EC Type approval and is designed for racing purpose. 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 5000 rpm right to the top of the range. At 10470 rpm Akrapovic measured 140.3 HP, with a max. power increase of 16.2 HP at 10400 rpm. The systems effect on the torque and power curve is huge and strongest at midrange rpm. The main increase starts at around 2500 rpm and continues right into the over-rev range. All this will help you shave lap times and result in a much smoother ride. Click here to view performance figures for this part NOTE Please check local laws before purchasing. Some modifications may be prohibited in some states. NOTE This is a 4-into-2-into-1 exhaust system. NOTE Racing exhaust systems are not compatible with Kawasaki side cases.