Was this the Swamp Series or the Swamp Series XL? I email HMF about both of these systems and they replied stating that the Swamp XL Series is 102-104db and the other Swamp Series is 94db. They also said that they make almost the same power it's just the Swamp Series is quiet.
"Question: What is the Db level of the 08' Teryx Swamp XL Series: Full System? I live and ride in areas that require lower db's but I want the power of an aftermarket exhaust.
Answer: 102-104db I would go with the swamp series. The only difference between the Swamp and the Swamp XL is the Swamp Series is quiet. The both make almost the same power. The Swamp series is around 94db.
Question2: Just to get this straight....The standard Swamp Series is around 94db and the XL is 102-104....but both the XL and the standard series have around a 6-7hp gain over the stock exhaust as the dyno chart shows?
Answer: Yes they both make around the same HP the Swamp is going to give you more low end power because its a chambered exhaust. The XL will give you a bit more top end power because it has a straight through core design."
Todd, I hope that you're testing the XL series as there's some truth to the standard Swamp Series only being 94db's. I would pay for this as I want to stay as close to the stock db level...but like everyone else, I want more power. So I would say that there are a few of us that want the BIG GRIN factor of a full exhaust but don't want to wake the nieghbors everytime we start it up.