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Hi guys, i have the stage 4 kit that turboXS makes and its awesome, i would have know hesitations recommending them, there best product is the UTEC engine management it is awesome to say the least
yeah they have them avaliable for the B4 legacy as well, you do need to specify that its a STi 2lt and it has to be the bug eye shape, if you email phil at phil@turboxs.com i know he has modded a few STi's and made top power, hope this helps