Hope it doesn't go the same way it did over at the Mazda forums with the Speed3 and Speed6. One by one, the cars with power mods started throwing rods. Lots of carnage on that site.
If the new Cadillac ATS 2.0 is any indicator, I don't see why you couldn't pump it up to at least 272 hp. That's not a lot of gain over 252...but it's closer to 300!