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I have read on here some people getting them to nearly 400bhp, but to keep it safe I would aim more for 350-360bhp. and depends on supporting mods keep in mind
agreed. the 2.5 seems to make power easier (awaits chocolate pistons reply). My hawk has a VF28 and made 316bhp and 350ft-lb torque. that is on stock cat and the original WRX intercooler.