500 Hp in a Boxter is just wrong on so many levels. I am sure it could be done. RUF 3.8L twin turbo build is probably in the ballpark for about $50K. It sounds like you really want/need a Viper.
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2009 Cayman 2.9L PDK (with a few tweaks)
PCA-GPX Chief Driving Instructor-Ret.
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