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I don't know. Anything is possible with enough determination and money. It looks like square peg/round hole to me though. I know two shops that have been attempting similar swaps for a year now and both have hit the DME wall.

If it were me (and it isn't) I would probably either keep the car and build it to spec rules to go racing with a thriving Boxster spec community in Texas or find a nice 2006 Cay S for cheap and go pound SCCA street prepared class. Either way could be fun. I get my kicks turning the steering wheel, not laying awake at night trying to unravel Porsche DME protocol. To each his own.