as an example look at a stock STi 205kws at fly and they dyno about 140kws - 160kws with basic exhaust mods, in theory you could count on being simular outputs,
To be honest I rarely use dyno figures as a bench mark, more so a tuning tool and comparison between mods (using the same dyno naturally)
And like DOUGMO said your A/F will make huge differences to output
Mine is VERY FAT in the big end! I'm sure at leaner A/F's I could add 10+ KWS easily
power to weight also a big part of how well your car will perform.
also have your cams been dialed in correctly? my mates car made 35 more kws with 2 degs put on the exhaust cam. It is all relative!! when it comes down to it!
JetGSR