BIG ONE Factory Auspuffanlagen - komplette Anlagen Steel Pipe/Schwarz Aluminium SchalldämpferThe Factory Expansion chamber is made from variable thickness steel sheets. This feature provides a greater prorection where it is needed and insures a great sound to the exhaust system. Completely handmade, eye catching look Welded joints are contained, to avoid protrusions Power increase over the entire range of use Compatible with the original silencer