Perrin Performance [15-21 Subaru WRX, STI] Rear Shock Tower Brace - Black Release Bearings If there's movement

If there's movement

without producing harsh or overly loud overtones during regular driving

Factory mounting compatibility - Bolts to original attachment points with no drilling or fabrication required

or extra hardware needed — just press-fit installation

If only the right side is damaged

Perrin Performance [15-21 Subaru WRX, STI] Rear Shock Tower Brace - Black Release Bearings If there's movementPERRIN Rear Shock Tower Brace for 20152021 WRX STI is a chassis enhancing suspension component engineered to stiffen the rear shock mounting area on compatible Subaru WRX and STI models. Designed with precision and durability in mind, it ties the rear shock towers together to reduce flex and support more predictable handling. Improves chassis rigidity and helps reduce flex under load for more consistent cornering behavior Transfers loads between shock