The 2015-2021 WRX Clight. These are drop in panels with the option for our SK6812RGBW led or our UCS2904RGBW led. The UCS variant does require a bit more work but it does offer a brighter output, and the use of a 12v input so no inverter needed. Plus the bullet proof reliability that UCS brings. The SK variant is still a great choice and requires less work to install. We feel that both are great options with pros and cons for each and we couldnt make up our mind which to go with so we did both. Please watch our install video going over both options and a few tricks we have learned along the way.