The mountune high-flow cotton gauze panel filter for the Mk4 Focus ST provides an instant improvement in both performance and induction noise and is easily installed in less than a minute.
Each mountune 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.
Increased induction noise
Includes 'do not discard airbox sticker'
Lifetime warranty against manufacturing defects
Note: Also compatible with Mk4 Focus ST-Line 1.5 turbo models.