We have partnered up with a well known exhaust manufacturer to bring you our own proprietary free flow exhaust system. Optional quiet core insert. Very light weight and noise adjustable. Our testing has shown averages with the core installed of 83db at idle and 89db at 3000 rpm. With the core removed it averages 89db at idle and over 100db at 3000 rpm.  Stainless tig welded mid-pipe with aluminum muffler.  Not forestry certified.