Michael did help me out with getting my turbo kit
i put it on myself though, just to save money plus its easy.
my tuner said if i had a set of injectors i would have made more than the 300rwhp that i did
(closer to 350) which is enough for a street car with a lot of response, nearly the same as a stock turbo
it also depends on other mods and also how healthy your engine is
plus the tune has a lot to do with it
i remember when i first got mine tuned and made 300, ryan with the same turbo with bigger injectors was still only making 300
but that was because of a really rich tune making big fark off flames