Weight reduction and performance - Removes factory hood/HVAC components to reduce vehicle weight by approximately 10 lbs, while improving engine cooling and enhancing sound. Upgraded airflow design - Open hood design increases engine compartment ventilation for better cooling efficiency and optimized performance. Double filter protection - Set of 2 filters effectively blocks dust and debris from entering the ventilation system while allowing maximum airflow. Compatibility and fit - Specially designed for BMW equipment, compatible with BMW 1 Series 2005-2015 (E81/E82/E87/E88), 3 Series (E90-E93) and X1 (E84) models (see full list in description). Use scenarios - Daily street driving in hot climates: improved cooling helps maintain engine performance and reduces heat soak during extended stops or city traffic. - Performance or spirited driving: enhanced airflow supports cooler engine operation during track days or fast driving, helping maintain consistent power delivery. - Dusty or off-street conditions: dual filters protect the ventilation system from dust and debris while preserving airflow.