BC Racing ER Coilovers for BMW M135i M140i M235i M240i F2x 5-Bolt Top Mount

Our External reservoir ER Series comes with separate compression and rebound damping adjustment. The ER Series coilovers bring with them the high quality and unique features seen on the BR Series and DS Series but have the additional benefit of external reservoirs and the ability to allow the end user to individually adjust and set compression and rebound damping rates.