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The Prothane 20mm rear sway bar bushings in black for 2005 Subaru WRX/STI are replacement suspension bushings sized to fit a 20mm sway bar on the rear axle of the specified WRX and STI models. Intended to support sway bar function and reduce unwanted movement, this overview states only the explicit 2005 Subaru fitment from the source and focuses on practical application rather than speculative performance claims.
Prothane 05 Subaru WRX/STI Rear Sway Bar Bushings - 20mm - Black
