DIAMOND S STAINLESS QUIET SILENCER FOR 2017-18 SKI-DOO REV GEN4 850 ETEC- New for 2018- this is a top quality stainless steel version of the Titanium silencer. These are made of 304 stainless steel and weigh only 6.2 pounds and have a 3.5 hp increase over stock. These are even quieter than the class leading Diamond S Ti Quiet cans we sell and a more affordable option. These pass the SAE J-2567 stationary noise test required by some states for reduced noise requirements. You guys looking for the quietest can in the business ?---here it is- and it still sounds great at w.o.t.!