The genuine RC40 system typically used with an LCB manifold it gives great performance with a mellow sound. 1.75" OD pipe, resonator & silencer ("two-box" system). Side exit. For mounting see 20/25.RC40FK. A link peace is available to fit o the original exhaust 20/22.LDP2. When fitted with the freeflow manifold 20/25.C-STR816 you will require 20/25.RC40-001 pipe that is 97cm long. Theinstallation is done atyour own risk. According totraffic regulationsnot allowed.