The Chrome expansion is made from variable thickness steel sheet. This feature provides greater protection in the most exposed parts to damage & maintains a good sound to the exhaust system. * The outer coating in nickel + chrome, guarantees a great resistance to weathering * Optimized development to reduce bulk & keep the expansion pipe very close around the engine. * For the Enduro version the expansion softens the engine output without penalizing the maximum power. * Compatible with the original silencer. Article: Fresco Chrome Expansion Chamber Chromed Steel