Febi Bilstein Air Filter - 48471 - OE Matching Quality and Precision Fit. This air filter is designed for optimal performance and a precise fit in your vehicle. Ensure this product is correct for your vehicle before purchase. Features include: Brand: Febi Bilstein, Quantity: 1 Unit, Filter type: Filter Insert, Length: 386 mm, Height: 62 mm, Width: 187 mm, With pre-filter. Weight: 0.481 kg. Filtration is a vital part of your vehicle's health. A dirty filter can do more harm than good. Pollution of the air with soot, dust, and pollen affects engine performance.