The mugen chips are impractical for most applications. Even the pr3 (b16) mugen chips are designed for 13:1 engines with race cams

For what it's worth, I have a PYR racing chip in my PM6 ecu and my butt dyno says it's a bit faster. Higher rev limit is nice too.

www.locashracing.com is a reputable ecu/chip seller, tell him I sent you