I'd say that like any other engine, it comes down to tuning. I've seen a stock internally Mazda B6 (Miata) engine make over 400 HP to the wheels. If it's in OE condition and tuned well it will make far mnore HP than a (well-meaning) list member spitting out some random number that so-and-so accomplished. It's in the tuning. Terry Heick Modern Sports Car Heick Resources