The big mistake everyone here is making is thats its turbo lag on the R's and most likely the new version of the S3 above. On the R's its a DBW delay, try putting your foot down a bit further so the DBW delay is removed and you'll see what I mean.
We have the K04's putting out 210 give or take and that is very hard to achieve on a VF34/35 STI size turbo on our dyno (we do a lot of Subies as well). The K04 is a good turbo well mated to the engine all you have to do is watch compressor surge between 3 and 4K![]()
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