Boomba Racing Aluminum Coolant Overflow Reservoir Cap Natural Finish 2002-2024 WRX / 2004-2021 STI

Here, you are looking at the Natural Finish Boomba Racing coolant overflow reservoir cap.

Add some style to your engine bay with this simple replacement! This cap is meant to replace the cheap looking OEM yellow plastic unit. Simply remove the OEM unit, and install the more attractive looking Boomba piece in place of the factory cap.

As always this product is designed and manufactured 100% in-house in the USA.