Originally Posted by homemade wrx

what year wrx do you have? if you have a 2.5L the vf39 is still a bit small in my opinion but better than what you have now...if you have a 2.0L its good for the 11's with a good driver and supporting setup. The STi injectors are sidefeeds instead of top feeds though...the vf43 is a newer sti turbo that is a bit nicer too.