Barkers posted results. Looks like a fairly decent gains to me, Barker's has a fairly good reputation, as does Alba I'm sure, would all these dyno results be BS? When combined with fuel controller and intake mods, there's your Commander Sport, I mean... Maverick hp. I'm no expert but a large part of the Can-Am's hp increase is due to a revised air intake and dual exhaust is it not?
http://www.rzrforums.net/rzr-xp-900/53821-rzr-900xp-tim-barker-dual-exhaust-pics-dyno.html
http://www.rzrforums.net/rzr-xp-900/56245-more-tim-barker-rzr-900xp-pipe-dyno-testing.html
Yes they did, but again, you did not read my posts. WITHOUT a controller! In both the threads you linked they specifically state that the gains are with an EFI controller. In the first thread, they say it isnt dialed in yet as they havent had a chance to mess with it. Look 2 posts up from where yours is and read what is quoted and what I said. The OP said nothing about modifying his intake or running a fuel controller. He specifically asked is the exhaust necessary. It is not, as pointed out in another thread to me, Polaris seemed to have gotten it right for the most part finally. If he wants to get the exhaust AND the controller, then yes, he will see some gains in HP. As you stated above, a modified intake, an exhaust, yada, yada, yada is why the other people have gains in HP. Well yeah, so will bolting on a turbo... Again, if someone wants to show me dyno runs with no controller on or any other mods, just an exhaust (and not a picture posted of a dyno sheet) and it shows a HP gain, I will glady say I am a dumass and dont know what I am talking about and appologize. However, I dont think it will happen, and if it does, will the increase in HP be worth $600+ to someone who isnt racing professionally?