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The Cusco OS rear strut bar is a rear tower brace for the FD3S Mazda RX-7, designed to link the rear strut towers and reduce chassis flex under lateral loads. This reinforcement helps maintain alignment and improves stability during cornering and track use. It installs as a direct replacement brace aimed at drivers who want improved rear-end predictability.
Cusco Strut Bar OS Rear FD3S RX7
