Horsepower: Truthfully, this is unknown. Nobody has done a good before/after dyno of both intakes. I would say they are both about the same, however.
Website: www.aempower.com. You can't order them from there though. You can get a pretty good deal on one from www.protege5online.com. That is where I got the blue AEM intake to match my blue MP3. Loving it