[cpt97m3]

First, this should probably go in the regular 1 series section, since it doesn't sound like you have a 1M.

You can do the M3 bushings without HPA's special tool. I did it with a E36 tool and some allthread, but others have done it with allthread, washers, and pipe fittings. A regular press would do it fine, but that would require taking the subframe out of the car, and that would be a lot of work. I would not recommend that, although I did it that way on my E36.