This is the same Coolant Overflow Tank + Washer Reservoir filler combo that is included with our 2004-2007 WRX and STI Front Mount Intercooler Kits. As a stand-alone item it helps to clean up the engine bay and tuck the over flow tank lower and out of sight. Constructed of aluminum and powder coated in a wrinkle black finish helps keep the engine bay tidy. The Washer Reservoir consists of a tubing extension, delrin base, and delirn cap. It is specific for 2006-2007 WRX/STI which has the reservoir located behind the bumper cover.
Use the COBB Overflow Tank and Washer Reservoir filler to clean up your engine bay and gain additional room for intercooler piping.