Have any of you used the:
Helix Racing Products Universal Turnout Muffler - 20" Muffler With Steel Core
Sold at the South Seattle Yamaha Sports Plaza..??
http://images.motorsportdealers.com/common/MediaLibrary/CatalogImages/125/250/690338902.jpg
Are they louder than stock?
Do they fit easily?
Tell me all you know before I go buy them... PLEASE.