There are plenty of options that have been discussed in this forum. Use the search function, it does work.
But, to answer your question, Ultimate Racing catback with mini muffler and resonator. All around good sound and gains.
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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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