2015-2021 Subaru WRX/STi 4th Brake Light Kit
2015-2021 Subaru WRX/STi 4th Brake Light Kit is backordered and will ship as soon as it is back in stock.
Optical
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Compliance
The Diode Dynamics C2 4th Brake Light Kit is a direct-fit LED lighting upgrade for the Subaru WRX and WRX STI, adding three functional lighting modes in a single compact pod mounted to the rear of your vehicle. It serves as a high-visibility brake light, a reverse light, and a running light — all in one clean, integrated package that works alongside your factory lighting without any cutting or splicing.
An optional F1-style sequential flash pattern gives you a more assertive brake signal presence, helping you stand out in traffic or on track days where rear visibility matters. The TIR optic design delivers focused, usable output rather than scattered light, so each function performs the way it should when you need it.
This kit is built for WRX and WRX STI owners who want a genuine functional upgrade rather than a cosmetic add-on. Installation is straightforward thanks to a plug-and-play harness and a vehicle-specific bracket, so you get a finished, factory-quality result without fabrication work.
