The E36 Diffuser & Flat Floor system is meticulously engineered to enhance your vehicle's aerodynamic performance by optimizing airflow beneath the chassis and minimizing drag. This component effectively seals the air gaps on the underbody, specifically between the subframe and the rear bumper, contributing to improved stability and efficiency at higher speeds. Designed with subtlety in mind, only the diffuser fins are visible from the rear, maintaining a seamless integration with the E36 body style. Constructed from lightweight 1.5mm thick aluminium, the rear diffuser weighs just 2155 grams, while the extended flat floor package weighs 3681 grams. The entire assembly is finished with a durable satin black powder coating, ensuring both longevity and a refined aesthetic. Compatibility extends to both M3 and Non-M bumpers, accommodating most exhaust configurations. The product includes a comprehensive installation guide along with all necessary hardware and spare parts for a straightforward fitment process. Two configurations are available to suit different performance needs: Rear Diffuser Flat Floor Package – includes extension for enhanced aerodynamic effect (refer to photos) For detailed technical specifications, refer to the material properties and strength analysis.