Designed for maximum torque and power across torque curve Made from durable 16 gauge steel body with a lightweight aluminum rear end cap Features a "quiet" 86-92dB sound level Includes U.S.F.S. approved, removable screen-type spark arrestor; replacement spark arrestor sold separately Bolts on to stock headpipe in minutes Repackable muffler body Made in the U.S.A.. EXHAUST RCM II S/O MAGNUM