What is the best material for a car's engine guard plate?

[MacKinsley]

The best material for a car's engine guard plate is steel plate. The engine guard plate serves the following purposes: 1. Reduce wind resistance under the chassis. The flatter the chassis, the smoother the airflow and the less resistance there is. The engine guard plate, combined with other chassis cover components, forms a relatively smooth surface, improving the flatness of the chassis and reducing turbulence. 2. Block sand, dust, and water. When a car is driving on the road, dust and water kicked up will flow through various parts of the chassis. The engine guard plate prevents sand, dust, and water from entering the engine compartment from below, affecting exposed moving parts such as the pulley system and compressor, which could cause additional wear. It also helps maintain the cleanliness of the engine compartment to some extent. 3. Protect the oil pan, transmission, and pipelines. It not only protects the oil pan but also provides some protection for the transmission, engine pipelines, and other components. However, the protective effect is quite limited.