The 2011 450 in stock form sounds sooooo bad (quiet). I'd like to add an exhaust in some form of fashion. So here are my questions: Should I add just a muffler? Should I add the complete exhaust? I mean, will adding the complete exhaust make that big of difference? I had heard that Suzuki had to mess with the timing on the 11 because of trying to meet the sound requirements so, when I do add an exhaust am I going to have to mess with the mapping or timing? Thanks.