Alky was a great mod for me. I'm in a lot of commute traffic so I only go through a gallon a month; however, the power is there when I want it. I would also highly recommend the Cobb AP for the map switching ability when adding alcohol injection. Harman Motive in Torrance, CA tuned my STi and I couldnít recommend them enough. No problems, daily driver and I track the car every other month or so. I use a race gas map on the track, no alky. List of mods for the car are on Harmanís website in the gallery section (Randy STi) although it appears the dyno sheet displayed is an old 91 map before I added the alky and AP.