yeah for $350US I don't think you get much increase, for $350 you can get a pile of Type-R stickers
I've heard some say boost the 92 horses to 110-120 but others mentioned not that much
If you go on PFF you will find thousands of threads, some suggest Cam swap, check it out. Was never intended to be a powerful engine and there are restrictions, plus with gas prices may not be a bad idea to mod for mileage.