The problem with OEM top mounts is that they are designed for the road and not to take the stresses and strains of the track.
The Turner Motorsport topmounts have a precision CNC-machined aluminum base with a replaceable rubber center section allowing you to change them whenever they start to wear rather than replace the whole mount.
Available for the E30, E36, Z3 and E46.
Please note that these are imported from the USA, no VAT will be charged but Import Duty will be due on delivery