For the the 600 E-TEC system we offer a rowdy can (3.5lbs), a race can (5 lbs) and a trail can (6 lbs). Our 3 standard sound options are now available for the 600 E-TEC, the rowdy can being our loudest option, then race can, followed by out very respectable trail can. All options include the temperature sensor bung. Heat black paint: Rowdy $315. Race $315. Trail $345.