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Read about it.
Sounds like awesome stuff. Or, well, an awesome process. Like shot-peening made into an art form. Pistons, rods, cranks, cams, valvesprings, tranny gears, oh my. It seems like it might be a good way to find some horsepower in an engine/transmission you've reached some limitation to. California cars anyone? Race classes?
There's a lnk to a video about it from SEMA on streetfire.com's main page right now.