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ok so your looking for a semi streetable 400hp. i say semi streetable because theres no way to make 400hp in a wrx without a decent amount of lag. how much are you willing to spend on this? lets see a good turbo will cost anywhere from $700 to $1000, new fuel pump 100 bucks, new injectors around 3-400 bucks, an exhaust around 5-700 bucks, new intercooler around 300 bucks, more if you want a name brand. new clutch to handle the power, plus a flywheel resurface at the least. and new tires because the stock ones wont last long with 400hp. oh and if you want reliability, i would factor in another grand or two for piggy backs and dyno tuning, at the least. so if you have at least 5 grand to put into this project, i can help you out. if your looking for 400hp for 550 bucks, your wrx is gonna be blown to pieces by your stupidity.

last of all, but certainly not least, dont ever buy turbo parts from ebay. some people can get away with it, but since you think that what turbo you have makes your car sound different, you arent smart enough to safely make that decision. granted since you want a turbo that makes your car sound cooler, you arent smart enough to have a wrx so do everyone a favor and sell it, and buy a civic. theres enough of them to withstand the loss of a few because of idiots who try and buy 400hp ebay turbos that sound cool.


now if none of the above applies to you, you will thus ignore my rant, go out and learn what it takes about cars, then make an informed decision based on realistic fact not what you saw in f+f or read in the latest stupor street.