Have an 06 Nomad that came with Cora Straight Pipes. Drove it home from Sandusky, Oh to Akron, Oh and by the time I got home had a headache, and I rode with a helmet on. Got home and immediately put the stock pipes back on, luckily they came with the bike. I also had the 900 first and at highway speeds it was louder only because the rpms are a lot higher.