hey, i own a 01 2.5rs and want to know wether there are any computer chips out there that increase the horse power for the imprezas.

Hi,
I have a piggyback computer chip called Torque Chip 2 (TC2), and I am very satisfied with the power gains! The one I have now is TC2 version2.5 and that is for automatic only. The latest one for manual is TC2 version3. I heard some good comments about it! Try to search from this forum and see what other people say.