Enhance the structural rigidity of your Mazda MX-5 NA or NB while adding a secure mounting point for your harnesses. The Beatrush Seat Belt Tower Harness Bar is designed to reinforce the chassis, reducing flex and improving stability, particularly in high-performance driving scenarios. This harness bar is constructed from a high-strength 40mm cold-drawn seamless carbon steel pipe and provides a solid mounting point for harnesses to mount to. The integrated threaded collars allow easy attachment of eyebolts, ensuring a straightforward and secure fitment. Please note this harness bar does not fit with the factory wind blocker. Features Enhances chassis rigidity and stability Provides secure harness mounting points 40mm seamless carbon steel construction Integrated threaded collars for easy eyebolt fitment Eyebolt size: 7/16-UNF