Flow Designs - Ford S550 Mustang Rear Valence Kit (2018-2022 Mustangs ONLY)

SKU: SKU: FlowDesigns-FN18VAL

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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 S550 Mustangs 2018+ - FN REAR VALANCE

Ford S550 Mustangs 2018+ - REAR VALANCE


Fits 2018+ Ford Mustang S550 FN


Experience Flow-Lock rear diffuser for your Mustang S550 FN, sharing the same durability and technology as our renowned WRX, Golf GTI & MK3 Focus RS line up which is trusted by car enthusiasts worldwide. The rear valance and diffuser fins will clear the Mustang S550 FN dual exhaust tips with ease, 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 Mustang S550 FN rear. Front lip splitter is also available for the Mustang S550 FN.

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.

Mustang S550 FN Rear Diffuser Kit Includes:

  • Mustang S550 FN rear diffuser (rear valance and Flow-Lock diffuser fins)
  • x2 Flow Designs stickers
  • Fitting kit

Mustang S550 FN Rear Diffuser Material & Finish:

  • 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

Installation Instructions