The Knecht air filter is a filter element for compatible BMW models. It has an outer diameter of 137 mm and an inner diameter of 69 mm.
- Filter type: Filter element
- Height: 195 mm
- Height 1: 142 mm
- Outer diameter: 137 mm
- Outer diameter 1: 156 mm
- Inner diameter 1: 69 mm
- Compatibility: BMW E87, BMW E90, BMW E91, BMW E92
- Net weight: 240 g