DG Performance 02-4170 - R-Series Slip-On Exhaust ( Aluminum) for Yamaha Raptor 350 (2004-2011 ) DG R-Series - A phenominal value! Aluminum body and Stainless steel midsection Repackable muffler Approx. 5.5 pounds Quality is excellent. The quality compares well to almost anything this side of a $600 complete system