DEI makes excellent products. I almost quit riding when I had my 09 SERG due to the heat, I had the complete Fullsac system, it was professionally tuned and still so much heat we both hated to ride it. Finally I wrapped the pipe with DEI's best from just below the port to the crossover. Made a huge difference. Everyone seemed to enjoy telling me it was going to make the pipe rust, which I didn't care about. It did make the bike alot more comfortable and I rode it alot more. But the guy who bought it removed the wrap the first weekend he had it to prevent rust and he thought it was not a Harley "look". Saw him a year later, he was complaining about the heat and how miserable it was to ride in the summer. To each his own.