K&N Cold Air Intake System: High-Flow Air-Filter, Increase Performance & Horsepower: Compatible with 2007-2020 VOLVO/FORD/MAZDA (See Product Description for Select Models); 57S-4000

Bought this for my 2018 Focus SE 2.0l non EcoBoost even though Amazon says it won’t fit. It actually fits just fine. This item is overpriced though. The stock air filter lid would of worked just fine probably. Wish I would of just bought the E-9289 open ended filter but so far so good. I took it on a test run with the rubber plug in the end and noticed a difference in sound, acceleration, and throttle response. I’m going to take it on another drive without the plug to see what the difference may be. The plug will be a good option for when I’m driving on dirt roads or if we have another insanely smokey summer like we’ve had the past 2 summers here in Western Washington.

Fits perfectly on my 2017 ford focus s (sedan), despite amazon saying it wouldn't. Sounds great and have better throttle response. Waiting to see if get better gas mileage. Will update if performance degrades within the next few months.

K&N is the best.

This kit alone has increased my fuel mileage substantially from 32.2 MPG to 38 MPG. Installed on a 2012 Ford Focus.

Fit perfect in my Ford Focus ST 2013.

This does fit the 2015 Ford Focus S but i did have some trouble putting it on, doesn't just slide in but i got it to fit, no gaps. Puts a little pep in its step. Got it mainly for more fuel economy.

With sound like a race car, great performance to come by，In a kit that I have purchased so far, it is the strongest intake kit!

i like the sound and performance improvementeasy to installif you're looking for a low cost, easy instalation, but real performance and sound improvement you should start with this

Super Produkt. Passgenau für meinen Focus St mk3. Laut JP- Performance (Prüfstand!) 10 PS mehr. Was auch schön ist , es gibt ein zischen beim Gangwechsel. Also super Produkt mit TÜV- Teilgutachten!!! Würde ich wieder kaufen!!!

Da 1 suono piú gradevole e cupo al mezzo (al mio) bello il coperchio con inciso il logo.. nel mio mancava il tappo laterale però.. non so se errore o altro.. poco male, lo uso senza, ma é stata 1 mancanza.. facile l'installazione, nessun errore di genere segnalato dalla macchina.

Der Luftfilter an sich ist gut wie von K&N zu erwarten . Der Luftfilter muss eingetragen werden und ist nur möglich mit dem K&N Deckel der mitgeliefert wird .Leider nicht eintragungsfrei!

Original K&N