Originally Posted by ThisIsLivin (Post 4705797)

I have the Gibson clamp on mufflers and they work well. I have had them 10 years and no problems. Still sounds serious when you jump on it, but very mellow when idling down the river. I love them for cruising very quiet in the boat loader outside the boat. Once it gets to about 3000rpm when your on it hard it comes alive. Didn't notice any change in power with them either.