This 2 into 1 muffler offers added torque and better flow over standard mufflers and open exhaust. These new mufflers feature a 14" long, 6" diameter body with a stainless steel tube, 3 1/2" I.D. 2 into 1 inlet and a 4" outlet. The end cap is removable so the muffler can be easily rebuilt. The compact design makes them easy to mount and they weigh only 9.5 pounds.