Originally Posted by Malek@MRF
The M3 GTS and CRT both utilize the same subframe. Also, they do not have separable bushings. The subframe is simply designed as a solid mounting piece.
Think of it as the bushings being welded in.
I will also reiterate this, having solid sub-frame bushings will NOT degrade ride quality. This is what happens with solid driveline bushings (motor, transmission, differential).
Malek is correct. The bushings are literally welded onto the subframe of the CRT and GTS, so they cannot be purchased separately. This is the same subframe and bushing combination used on the GT4, which costs about $2,200.