Expected weight saving and power gain vs. original exhaust: Motorcycle ModelSaving (KG)Increase (BHP @ RPM)Z 750 (ZR 750) (slip-on silencers)4.113.8 @ 11100Z 750 (ZR 750) (stainless 4-2-1 conical system)5.2111.7 @ 11630 Street legal with official markings....