I installed one of these FI2000 on mine, and right off the bat, I could tell a huge difference even with it stock. I will saty that the Cobra site is right. It does seem to run alot cooler.
I have noted that when I shift to 2nd gear and twist the throttle, it seems like it pulls alot harder and has way better response. Yea I would have to say it was a good investment. I did get the Wild Pigs Slip-ons installed and in that I can tell a difference. Now I just need to get the air cleaner. I was thinking of getting a K&N air filter for the stock breather box. Good investment? I like the ability to clean the airfilter element.