Expected weight saving and power gain vs. original exhaust: Motorcycle ModelSaving (KG)Increase (BHP @ RPM)GSX 1300R Hayabusa (Pair of slip-on hexagonal silencers)9.84.1 @ 10190GSX 1300R Hayabusa (Stainless 4-2-1 conical system with hexagonal silencer)15.911.9...