Given cubic amounts of money anything is possible - but in this case it
might require some rather massive re-engineering of the transmission
tunnel and mounting points, plus probably driveline and shift linkage.
Possibe - anything is --- practical - hardly.
Best way to achieve this is to sell the '93 car and buy an E46 M3 with
the 6-speed installed. Probably less expensive in the long run than what
you're trying to do (only about $29k difference in value between a '93
any BMW and an '03 M3..)
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