Subaru JDM STI Rr Flexible Draw Stiffener 2015-2021 WRX / 2015-2021 STI

This flexible draw stiffener is designed for the upper trunk area of the S209 and WRX S4 STI Sport, providing improved handling and stability. Installed in the trunk or bumper, it helps equalize chassis rigidity by redirecting forces that are interrupted at weaker points of the vehicle body, such as the trunk and hood, which are designed to collapse for passenger and pedestrian safety during a collision.

By applying controlled tension, the flexible draw stiffener allows impact forces generated during driving to be distributed more effectively to all four wheels, enhancing tire grip, improving handling response, and increasing overall vehicle stability.