These custom 3D-printed diffuser fins are engineered specifically for the Ford Fiesta Mk6 ST150, transforming the rear bumper with a sharper, more aggressive motorsport-inspired look. Designed to mount directly onto the OEM bumper, they add depth, structure, and visual width without overpowering the car’s original lines.

Product Details:

• Part: Rear Diffuser Fins (Set)
• Compatibility: Ford Fiesta Mk6 ST150 (2005–2008, OEM bumper)
• Fitment: Bolt-on installation — requires drilling
• Material: ABS plastic
• Hardware: Bolts included
• Extras: Drilling template + pre-installed threaded inserts

Fitment Notes

Installation requires drilling small holes in the OEM bumper.
For professional installation and perfect alignment:

• Each fin comes with melted-in threaded brass inserts for strong and repeatable fastening.

• All bolts are included.

• A drilling template is included, matched precisely to the shape of each fin. This allows you to mark and drill every mounting hole with perfect accuracy and alignment, ensuring a clean, professional installation.

Why This Product?

OEM Fiesta bumpers lack any form of diffuser structure, leaving the rear design flat and plain. These fins instantly add stronger definition and a more aggressive motorsport-inspired rear end. Unlike universal fins, these are shaped specifically for the ST150 bumper curvature for a clean OEM+ aesthetic.

Material – ABS Plastic

ABS offers the ideal mix of rigidity, durability, and resistance to vibration and heat—perfect for exterior aero components. Its strength allows the fins to remain stable at speed while staying lightweight.

Surface Finish Note

Visible layer lines are a normal characteristic of 3D-printed parts. For an OEM-style finish, sanding + primer + paint is recommended (optional, not required for installation).

Finish & Appearance

These parts are supplied unpainted.

To achieve the best appearance and longest durability, we strongly recommend sanding, priming, and painting the parts.
ABS is naturally vulnerable to UV exposure if left unpainted, especially when used on exterior car parts, so applying paint will provide protection and preserve the clean look.

Photo Note:
• Unmounted product photos show the raw finish exactly as it arrives to the client.
• Mounted photos show a painted final result for reference only.

Production Quality

Each fin set is modeled specifically for the ST150 bumper and produced with calibrated settings for strength, clean geometry, and consistent output. Threaded inserts are installed during manufacturing to ensure secure, repeatable mounting and long-term durability.

Compatibility & Legal Notice

This is an aftermarket custom-designed product made using 3D modeling and additive manufacturing. It is not an official Ford part. Vehicle names are used only for compatibility description.