The Akrapovic EVOLUTION “Slash” cut SHORTY systems for the 07-08 R1 are made of Titanium piping with a specific 4-2-1-2 configuration. Mufflers is available titanium with outlet caps made of carbon-fiber on the SHORT SLASH CUT version. Includes silicon coated strings and carbon can straps for both models. Gains of 7-9 + HP can be achieved with these systems (tuning device like a Dynojet PC3 usb is recomended also).