Expected weight saving and power gain vs. original exhaust: Motorcycle ModelSaving (KG)Increase (BHP @ RPM)S 1000 RR (4-2-1 system with hexagonal silencer)6.2311.19 @ 8450S 1000 RR (4-2-1 system with ASZ style silencer)7.5711.19 @ 8450S 1000 RR (Full...