These harnesses will allow you to install 2018-2020 OEM LED headlights on the 2015-2017 STI models, 2015 WRX models, and 2018-2020 WRX Base/Premium models. If you plan on upgrading to those headlights, the OLM Headlight Upgrade Harness will allow you to simply integrate these headlights into your vehicle as these are plug-and-play to allow for quick and reliable connections.
Features:

• Headlight Upgrade Harness for 18 Headlights (Pair) - 15-17 Subaru WRX STI
• Allows users to upgrade 2018-2020 OEM LED headlights
• Simple plug and play installation
• Includes (2) harnesses for each side

Fits:

• 2015-2017 STI models
• 2015-2017 WRX models
• 2018-2020 WRX Base and Premium models