Expected weight saving and power gain vs. original exhaust: Motorcycle ModelSaving (KG)Increase (BHP @ RPM)Z 1000 (ZR 1000) (Slip-on hexagonal silencer)7.03.0 @ 10400Z 1000 (ZR 1000) (Stainless 4-2-1 conical system with hexagonal carbon silencer)10.2110.0...