# The latest version of the Powercore IV design incorporates a hi-flow core which has more surface area to absorb more sound while flowing more exhaust # Constructed with an extruded aluminum canister, a stainless steel midpipe that is MIG/TIG welded and has space age internal packing # Lighter, stronger and more powerful than stock exhausts # Powercore IV S/A has a U.S. Forestry approved maintenance free, stainless steel spark arrestor screen