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The DBA 5000 Series replacement ring for 2013–2018 Ford Focus ST (with 320mm front rotor) restores two-piece rotor performance using a high-carbon cast-iron ring that mates to aerospace-grade T6061‑T6 aluminum hats. This NAS-bolted composite design reduces unsprung mass and improves heat management over one-piece rotors. Rings are available separately so you can reuse 5000 Series hats for street, track day or club racing applications.
DBA 13-18 Ford Focus ST (w/320mm Front Rotor) Front 5000 Series Replacement Ring
