Triple R Composites Ford Fiesta MK8 ST Diffuser Fins & Rain Light
Give your 2018-2021 Ford Fiesta MK8 ST a sharper, motorsport-inspired rear end with this diffuser fin and rain light kit. It adds a more aggressive look and a functional LED centre light, similar to those used on race cars in wet conditions.
Why choose this kit
- Set of 4 rear diffuser fins with central rain light mount for a race-inspired look
- LED rain light included, with multiple strobe patterns
- CAD designed from 3D scan data of the Fiesta MK8 ST for an accurate fit
- Tough Nylon 12 construction, 3D printed using SLS technology for strength
- Media blasted and finished in black for an OEM-style bumper trim appearance
- Stainless steel fitting kit included
The fins tidy up the rear bumper area and make the car look lower and wider. The central LED rain light adds a clear focal point at the back and improves visibility to drivers behind when used correctly.
LED rain light wiring
The LED centre light can be wired to suit how you want it to work. The wiring is simple:
Red wire – positive feed (power supply)
Black wire – earth (ground connection)
Yellow wire – touch against the positive feed to change the strobe pattern
This lets you cycle through different flash patterns until you find one you like. We recommend any wiring is carried out by a competent person so it is safe and road legal in your area.
Fitment and compatibility
Designed to fit Ford Fiesta MK8 ST models from 2018-2021.
Check your model is the correct MK8 ST version before ordering.
Use the vehicle lookup on our site or check the Vehicle Fitment tab for full details before ordering.
Triple R Composites UK Authorised Installer & Distributor.




