Expected weight saving and power gain vs. original exhaust:OptionPowerTorqueWeight Race Carbon Silencer Slip-On Kit - Hexagonal1.1 bhp @ 10200 rpm1.4 ft/lb @ 3250 rpm-2.4 kgRoad Legal Titanium Silencer Slip-On Kit - Hexagonal0.9 bhp @ 9350 rpm0.6 ft/lb...