Expected weight saving and power gain vs. original exhaust: OptionSaving (KG)Increase (BHP @ RPM)Black Slip-On1.40.8 @ 10000Stainless 4-into-1 hdr56.8 @ 6450Titanium 4-into-1 hdr5.76.8 @ 6450 Street legal with official markings. Removable baffle. Full...