Subaru JDM STI Flexible Rear Subframe Support 2015-2021 WRX / 2015-2021 STI

This STI rear cross-member stiffening component connects the rear cross member to the vehicle body while incorporating a rubber bushing to separate the left and right sides, adding controlled flexibility to the rear.

STI’s tuning optimizes power transmission from front to rear during steering and enhances grip on all four wheels, improving cornering stability, delivering fast and responsive steering, and maintaining a comfortable driving experience.

This component is designed with the assumption that the STI flexible tower bar is also installed, maximizing the combined handling benefits.