Generally speaking, increased HP and increased fuel economy aren't really two things that go together. Unless of course we're talking radical changes, like going from carburated to fuel injected, or if your car was ****ed to begin with.
I'd be extremely cautious about something like that. After reading their site, i wouldn't put it my car. It's just as likely to **** shit up as it is to make it better. It states that the perfect air to fuel ratio is 14.7 to 1. The perfect air to fuel ratio is going to vary by car, and plugging in a chip that alters the manufactures settings is playing with fire.
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