Expected weight saving and power gain vs. original exhaust:OptionPowerTorqueWeight Road Legal Titanium Silencer Slip-On Kit1.0 bhp @ 8200 rpm0.7 t/lb @ 5250 rpm0 kgOptional Stainless Steel 4-1 Racing Header Set10.5 bhp @ 8600 rpm4.7 ft/lb @ 2900 rpm-6.8...