What model E-36 suspension are you swapping? The front struts and spindles fit from the E-36, but you have to use the E-30 strut hats. You can use the E-30 lower control arms, with the E-30 M3 offset control arm bushings and machine 6mm out of the bushing brackets. This is done to center the front wheels in the wheel well. The E-36 M3 struts and spindles are the better ones to use because they use larger rotors and calipers. In the rear the 318ti, z3, and m-roadster trailing arms and spindles will bolt up. The m-roadster trailing arms are reinforced and come with larger calipers and rotors. The parking brake cables off your E-30 must be used because the E-36 models listed above are to short and won't reach the parking brake inside the car. With the E-36 M3 front struts and spindles you will need 17in. rims to clear the larger rotors and calipers. Hope that helps.
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