The Prothane rear sway bar bushing for 2005 Subaru WRX/STI is a 20mm replacement bushing finished in red for the rear stabilizer bar. It specifies rear position and the 20mm dimension for that model year, making it straightforward for owners to identify the correct rear sway bar mounting bushing size and color for the 2005 WRX/STI.
Prothane 05 Subaru WRX/STI Rear Sway Bar Bushings - 20mm - Red