If you're looking to improve your Fiesta ST's handling one step beyond a simple lowering spring kit, or full blown coilover set up - the Eibach Rear Anti-Roll bar is an awesome solution!
The heavy duty 21mm rear sway bar is designed to reduce body roll through increased design stiffness. The result is dramatically improved handling and cornering grip in any performance-driving situation. Eibach manufactures their sway bars out of cold-formed, high-strength aircraft-grade steel for precision performance. Every sway bar features a long-lasting red powder coated finish for an awesome, durable finish. The rear anti-sway bar comes complete with greased urethane bushings for improved responsiveness and all necessary mounting hardware and instructions for a very straight forward installation.
The Eibach Rear Anti-Roll Bar is designed to fit the 2014+ Fiesta ST.