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From baseline to redline, ROUSH Performance has you covered with the all-new 2013–2018 Ford Focus ST, 2016–2018 Focus RS Cold Air Intake System. The engineers at ROUSH Performance designed this kit for improved performance you can hear and feel! All components in this system are direct replacements to the restrictive stock intake, from the air filter to the turbo inlet. This free-flowing air intake kit contains a custom ROUSH Performance-branded air box that is topped with EPDM foam for an airtight seal to the hood.