Hooker 21005HKR Single 2-1/4" Offset Inlet, Single 2-1/4" Center Outlet Single 2-1/4" Offset Inlet Single 2-1/4" Center Outlet 2-1/4" free flow cores Ensure a Low backpressure Reverse Flow Baffle Network Compact Muffler Design Flows Either Direction, Allowing Easy Installation Throaty Exhaust Sound on Acceleration with Quiet Operation at Idle and Cruising Speeds