My guess is because Evos are much newer and superior to DSMs in all performance aspects (with the one exception being stock weight). I'm not just talking about power, I'm talking about the whole package since a lot of us like to turn the wheel too.
DSMs are great considering what they are (cheap and easy to mod), but they are not the end-all for performance cars. Oddly enough, advances have been made in the past 20 years
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