Akrapovic Racing and Evolution systems are designed for riders who demand maximum performance from their motorcycle. Both systems are significantly lighter if compared to stock exhaust system and feature exceptional production quality, hi-tech materials and of course increased engine performance combined with pure racing sound output. 
The following file contains detail description and explanation on Akrapovic Twin Exhaust System for 2009 SUZUKI GSX-R 1000 and its schematic diagram. The system’s effect on the torque and power curve is huge and strongest in midrange rpm.
Get more info on Akrapovic Twin Exhaust System Schematic Diagram for 2009 SUZUKI GSX-R 1000 here – free download PDF file from Akrapovic.com