hi rich
the subframe is the same for all ti an Z models ( exept M )
http://fr.bmwfans.info/parts-catalog/33311090957/ the output flange are specific
http://bmwfans.info/parts-catalog/E3...ension_gasket/ like the output shaft
http://bmwfans.info/parts-catalog/E3...haft#1229582_1 like the trailing arms
http://bmwfans.info/parts-catalog/E3...ion/#1095125_7 but i think its just because they are reinforced
the brakes are the same (272x10)
http://bmwfans.info/parts-catalog/E3...ad_wear_sensor with this i can say that all parts are exchangeable and can fit with a little adaptations for certain