MK4 Focus ST-Line Flow-Lock Rear DiffuserSuits MK4 Focus St Line Models INSTALL DOES NOT REQUIRE BUMPER REMOVAL Details: Get the Flow Lock Rear Diffuser for your Ford MK4 Focus ST Line, which shares the same durability and technology as our renowned WRX, Golf GTI & Hyundai i30N line up which is trusted by car enthusiasts worldwide. The rear valance and diffuser fins will clear the Focus ST dual exhaust and rear bumper removal is not necessary for installation of the diffuser. The Flow Lock
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