The project focuses on the design and development of a semi-active magnetorheological (MR) suspension system tailored for automotive and motorsport applications. The study addresses the limitations of conventional passive suspension systems by exploring MR dampers, which use magnetorheological fluids to adapt damping forces dynamically. Through varying magnetic field strengths, these dampers adjust their characteristics in real-time to accommodate diverse driving conditions, enhancing vehicle stability, handling, and ride comfort. The project encompasses the conceptualization, design, simulation, and optimization stages of the MR damper, including electromagnetic coil development, piston design, and performance validation through modeling and physical testing. The findings aim to pave the way for more efficient, adaptable suspension systems in high-performance and general automotive contexts.