2:2 Free-flow design equals solid HP gains; Hidden crossover provides performance benefits of 2:1 High Flow catalytic converters maintain the performance of a straight through system Oxygen sensor ports allow use of wide band or stock 02 sensors Full heat shields on both front and rear headers Race inspired Grand NationalĀ« end cap Made in USA! Mid mounts require S&S brake pedal kit. EXHAUST GN2-2CH 50S.M8