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Hagerty Employee

This DIY Freevalve engine conversion demonstrates how brilliantly simple Koenigsegg’s idea is

The last time we saw Wesley Kagan’s Lotus-inspired PorscheCart, it had been introduced and shaken down by our intrepid builder after going through the process of stripping down a tired Boxster to donate its drivetrain and suspension. Of course, with that out of the way, it was time to get fully obsessed with the details, and that brings us to the current project at hand: a DIY Freevalve system.


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