Flow Designs - Ford MK3 Focus RS Rear Flow-Lock Rear Diffuser (USDM ONLY)


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Please Note: Pricing on our site is pricing for this one individual part picked up at our shop. Please contact us if planning on buying more than one FlowDesigns product as we will be able to offer discounts on multiple Flow products.

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Ford MK3 FOCUS RS FLOW-LOCK REAR DIFFUSER (USDM) - Please note that this ONLY Fits North American Models (NO rear lower fog light)

Suits Ford USDM Version MK3 Focus RS (WITHOUT Rear Lower Fog Light)

Ford MK3 Focus RS Flow-Lock Rear Diffuser for USDM


Please note this diffuser is only suitable with the MK3 Focus RS WITHOUT the rear lower fog light (USDM).

Get the Flow-Lock rear diffuser for your Ford MK3 Focus RS, 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 RS dual exhaust and rear bumper removal is not necessary for installation of the diffuser. 10 year warranty applies for the rear valance (excludes ABS fins).

The Flow-Lock interlocking system allows for the final assembly of the diffuser fins without tools or fasteners. A simple push and click and the kit is assembled and ready for installation - this means zero exposed hardware giving you the cleanest look for your MK3 Focus RS rear bumper. Front lip splitter is also available for the MK3 Focus RS.

No more L-brackets, no additional exposed hardware and no double-sided tape, experience the Flow-Lock difference today!

Valance is installed to the car through bolts and nuts while the Flow-Lock diffuser fins simply click into the valance (once locked into the valance it is secure). It is also possible to install when your car is on the ground.


  • Ford MK3 Focus RS (USDM) rear diffuser (rear valance and Flow-Lock diffuser fins)
  • 2 Flow Designs stickers
  • Fitting kit


  • Valance: 10mm thick polyethylene composite, bevelled edges
  • Flow-Lock diffuser fins: 4.5mm thick textured ABS
  • Valance: Hand polished satin black
  • Flow-Lock diffuser fins: scratch resistant textured ABS plastic
  • CNC engraved logo and features


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