Is it possible to have disc brakes in the rear of my E30 318i rather than drum brakes? If so how easy would it be to do this conversion? What kind of cost am I looking at and will I be losing anything by doing this?

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We have no idea how much it would cost because we don't know what you are going to pay for used parts? It will involve taking the rear spindle and probably suspension arms out of a newer model than yours and installing them on your car. You may even have to change the whole subframe which believe it on not would be easier. You will also have to change the proportioning valve to direct less brake fluid to the rear so the rear wheels do not lock up under heavy braking.

- Kerry