1. WEIGHT REDUCTION: Improve your performance by installing these hood filters that help reduce the overall weight of the vehicle by approx. 4.5 kg. By removing the hood and HVAC filtration system, you will experience improved efficiency and responsiveness in your model 335i, 135i, X1, 128i, 320i, 328i, or 330i. 2. ENGINE COOLING: The innovative design allows for better air circulation in the engine compartment of your E82, E88, E90, E91, E92, or E93. This improved ventilation results in cooling and produces a more pleasant engine sound that enthusiasts will appreciate. 3. EFFECTIVE FILTRATION SYSTEM: Specially designed for 1 Series models, these filters keep dust and debris out of internal ventilation. The interior of your vehicle stays cleaner and fresher for a more comfortable driving experience. 4. EASY MAINTENANCE ACCESS: The thoughtful design makes it easy to access important components such as DME boxes and spark plugs in your car. This simplifies routine maintenance tasks and saves valuable time when working on your 335i, 135i, X1, 128i, 320i, 328i, or 330i.