Highspirits Posted July 25, 2014 Share Posted July 25, 2014 Been doing a lot of looking at reviews of the WRX STI and it seems they vary from US/JDM/UK in power output, in the UK they are listed as 296bhp and in the US/JDM they are 305bhp or 300bhp. Is it just how they convert their BHP from 300PS in each country or is there actually a different ECU map or fuel RON level which affects how much power it develops. Did a search on the forum but couldn't see anything out about the power from the EJ257 and thought someone here probably knows. Quote Link to comment Share on other sites More sharing options...
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