Triumph Rocket 3 Roadster/Touring collector box by-pass is custom made from high grade stainless steel. This high flowing by-pass pipe will produce power gains and better sound. The by-pass pipe uses the standard mounting points to support the exhaust correctly, unlike other pipes on the market! Rocket 3 Roadster 2011+ (2 mufflers) Rocket 3 Touring 2008+ (2 mufflers).