i bought RHD mirrors to my LHD e46 non-M Coupe and I created this raisers in order to get a better view angles (close to regular mirrors). This can be use to rise the angle of either side of the mirror and can be used in both mirrors. So with this you can "transform" RHD to LHD and viceversa. Dry-fit before fastening and verify glass, latch, wiring and trim clearance through full operation.