L/R axle recoil system: 028017 1500 + 028017 1600 or 028017 1610 (without CE homologation) + exhaust pipe set. No vehicle modification necessary! Tailpipes L/R RACING with 2 electric valves and REMUS sound controller, Without CE approval Valve activation can be done via the supplied REMUS sound controller and the REMUS sound control app. The sound/APP controller in combination with the electric actuators allows to actuate the valve in different positions. The REMUS sound controller consists of the electronic module, the OBDII plug, the remote control button as well as the electric actuator including cables. Without CE approval