Tronic Posted November 4, 2018 Share Posted November 4, 2018 Without search this entire forum, has anyone had any direct experience in what you can get out of a brand new WRX STi with just taking it to a decent tuning shop and getting them to re-map, ie flash the stock ECU ? I don't want to make a single change to the car in terms of intake, exhaust etc, just re-flash the factory ECU and run on 98 octane fuel ONLY. Obviously run a top quality synthetic oil and maintain the car. I know this is a Legacy forum, but there are plenty of people here that have owned a number of Subaru's. Link to comment Share on other sites More sharing options...
whitetiger Posted November 4, 2018 Share Posted November 4, 2018 What you are talking about is considered stage 1 and is usually good for 15-30 hp depending on a number of factors. Search stage 1 tunes to find out more. Link to comment Share on other sites More sharing options...
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