The CLM diffuser for BMW E81 / E87 was designed by COELMOTORSPORT and is produced using CNC methods. The diffuser was cut out with a Fiber laser with 3 mm thick aluminum and then bent to its final shape on a CNC edge bender. The diffuser is mounted with three brackets fitted into the rear belt of the 1 series. The installation of the diffuser requires drilling two 10 mm holes in the rear belt. Set of bolts is included.
The diffuser has one ready undercut for the exhaust and another, symmetrical place on the other side cut with a laser and possible to "break" in the case of mounting a double exhaust for the V8 engine. The diffuser is powder-coated in black with a fine texture.