For Original Yoshimura R11 R55 R77 Motorcycle Exhaust Exhaust Pipe Systmes 49mm Replaceable DB Killer Muffler Silencer Silenciador -- Please make sure this part fits your motorcycle before ordering. brand new, never installed, high quality reducing overall wight for performance to get maximum performance Professional installation Recommended Material: stainless steel Made of metal material, very durable. Can effectively reduce deep sound notes and also reduce noise pollution. Installation instruction is not included. Package includes: 1pcs * db killer Note 1. Please allow 1-3mm error due to manual measurement. Pls make sure you don't mind before bidding.2. The color may be different from the difference displayed, please understand.