RalliTEK has AccessPORT for 2005-2008 Impreza 2.5i MT. Maps for 87-94 octane are available.

http://ep.yimg.com/ca/I/yhst-49187380673845_2073_17832869
There is a larger dyno chart posted on our website that shows AccessPORT and RalliTEK Camshafts, gains of 37whp!

Link: http://www.rallitek.com/acimmt.html

Stage1 is seeing gains of 5-15whp depending on octane of fuel used.

We have ECONO maps (and are getting 38mpg on the freeway!).

The most dramatic difference is in the throttle mapping. That sluggish throttle by wire is no more! You will be able to choose different throttle maps with your AccessPORT. Stock swampy throttle for ECONO and crisp responsive power for Stg1. Multiple settings are available.

Maps and shipping are included at no extra charge. RalliTEK NA AccessPORT is a full featured AP. Datalogging, 0-60, 1/4mile, read trouble codes, tune your self via Cobb RaceTUNER, or visit your local Cobb authorized dyno facility for custom tuning!

Link to our new AP is at www.RalliTEK.com along with cams, heads and other bits for your Impreza 2.5i.

STG1: mapping includes standard and aggressive throttle mapping for 91+ and 93+ octane fuels.
STG2: RalliTEK camshafts, plus the same requirements as STG1
ECONO: includes de-tuned throttle mapping to assist in fuel economy and can use 87 octane fuel.
ANTI-THEFT: car will not start without Accessport
VALET: severely de-tuned throttle mapping and 2500 rpm rev limit
STOCK: is the original factory mapping

These maps are for all applicable models. 2005-2009 Impreza MT, and 2009 Impreza AT