The SD Pro high-flow dry cotton panel filter for the mk4 focus provides an instant improvement in both performance and induction noise and is easily installed in less than a minute.
 
Each filter is manufactured using a multi-stage process resulting in a great fit and virtually no seepage of frame material into the filtration media producing the maximum available filter area.
 
Will fit all Mk4 petrol and diesel models including ST 2.3T EcoBoost and 2.0L EcoBlue engines.