I'd advise you not do anything crazy as far as boost goes. Do some research on the Ralliart and EvoMR, and you'll find that you can't just install any BOV/BPV on these SST-equipped vehicles. They're very sensitive to boost levels, your best bet is to find a metal OEM BPV from an Evo, they're great, cheap and can hold boost at higher levels than the stock plastic crap.
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-2014 Ford Focus ST///2.0L EcoBoost, 6 speed manual, ST3 package, Ingot Silver Metallic
-2011 Mitsu Lancer RALLIART "Veronica" (RETIRED)
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