The Two Brothers Racing Comp-S 2-1 Exhaust gives you the classic bobber style with modern engineering that makes you feel the performance gains from a system designed and tuned for increased torque and horsepower. Mandrel bent stainless steel tubing All TIG welds done by hand High-temp stainless steel wool and packing material Accepts stock O2 sensor Includes all mounting hardware Available in ceramic black or stainless steel