Good choice with getting the Mugen gasket. As stated above, you will have to be careful about detonation. See if you can get gas with a few points higher octane rating. I would strongly suggest running at least 93 octane just to be safe. I know that the car has a knock sensor that automatically retards timing, but still, better safe than sorry. I don't know how much power you'll get in return for bumping the compression, but I hope you get some decent power out of this.