DG PERFORMANCE 051-4740 Utility Series Slip-On Exhaust 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 and a removable 1" Quiet Core insert Includes U.S.F.S. approved, removable screen-type spark arrestor; replacement spark arrestor sold separately