This is the stock trunk spoiler that came with the 2015-2021 STI. It adds significant downforce at high speeds. The wing comes unpainted, so plan to have your local auto body shop paint and/or install it. Drilling will be necessary for installation. Includes flange nuts. Does NOT come with a template for drilling; sorry.
You'll also want to add the matching STI trunk springs so your trunk opens and closes normally.
Yes, this wing CAN be installed over top of the factory WRX lip spoiler.
Fits all 2015-2021 Subaru WRX and WRX STI.