I know mine is not meant for stop and go traffic in the Summer. Luckily, I don't run across much traffic. Although, when I was running the stock exhaust and tune, it did seem to run cooler. Really, it's not different than having a Harley exhaust next to your leg. When the fan kicks in, it blows all the heat on you.. and that sucks, but when a Harley is that hot.. all the heat just rises up to you... so not much difference there either. I DO find that when I had the Roadster screen on for a while, that thing traps all the heat rising from the radiator and puts it right on the rider! Much cooler riding with just the fly screen...