I've install 1 too and love it, I think it looks way better and also retains more snow for cooling things down, Yamaha had a reason to revise it, they wanted more snow to flow in to the tunnel to run cooler...
I've also installed a rear cooler and this helps to keep the ice build-up down and give you extra cooling, I've never overheated in marginal snow conditions this year, on 1 trip in Quebec this year 3 other 4 strokers without the rear cooler did overheat on certain occasion especially when you're riding at low speeds. I'ts worth $$$...