I have a 2011 wrx and I keep wondering how much power can a wrx take before parts star to fail? I was watching a lot of vidsof cobb tunes and they show 300 whp on a wrx. Is there any problems with going higher? fuel system, turbo output, engine internals, trans/clutch problems? Im looking to have the most amount of wheel hp without having to upgrade turbo or intercooler or fuel. like 300-350 whp would be nice. any one have any comments ?