K&N’s 57S Filter element only, is supplied with a rubber bung which once removed increases waste gate turbo chatter noise! it can be easily replaced if you require a quieter driving experience.
Focus Mk2 RS – fits with standard Airbox or with standard Airbox fitted with mountune Airbox lid or J1 Airbox lid
Focus Mk3 ST250, Zetec S 1.6  & 1.6 Eco Boost, 1.1 Eco Boost
K&N Performance FILTERS increase horsepower and acceleration by dramatically reducing air flow restriction caused by the original factory design. They come with K&N’s Million-Mile Limited Warranty. 57S series air-filter replace the factory air filter housing with a fully enclosed injection modified air box containing a reusable K&N air filter. Installation is easy as they are specifically engineered to use factory holes and mounting points. No additional hardware, cutting or drilling is required

Fits the following vehicles:

FORD

Mk1 C-Max (1.6, 1.6 TDCi, 1.8, 2.0, 2.0 TDCi) – 2007-2010
Mk2 C-Max (1.0 EcoBoost, 1.6 EcoBoost, 1.5 TDCi, 1.6 EcoBoost, 1.6 TDCi, 2.0 TDCi) – 2010 on.
Mk2 Focus Convertible (1.6, 2.0, 2.0 TDCi) – 2006-2010
Mk2 Focus Estate (1.4, 1.6, 1.6 TDCi, 1.8, 2.0, 2.0 TDCi) – 2004-2012
Mk2 Focus Hatchback (1.4, 1.6, 1.6 TDCi, 1.8, 2.0, 2.0 TDCi) – 2004-2012
Mk2 Focus Saloon (1.4, 1.6, 1.6 TDCi, 1.8, 2.0, 2.0 TDCi) – 2005-2012
Mk2 Focus 2.5 ST225 – 2006-2011
Mk2 Focus 2.5 RS, RS500 -2009-2011
Mk3 Focus Hatchback (1.0 EcoBoost, 1.5 EcoBoost, 1.5 TDCi, 1.6 EcoBoost, 1.6 TDCi, 2.0 TDCi) – 2010-2018
Mk3 Focus Saloon (1.0 EcoBoost, 1.5 EcoBoost, 1.5 TDCi, 1.6 EcoBoost, 1.6 TDCi, 2.0 TDCi) – 2010-2018
Mk3 Focus Estate (1.0 EcoBoost, 1.5 EcoBoost, 1.5 TDCi, 1.6 EcoBoost, 1.6 TDCi, 2.0 TDCi) – 2010-2018
Mk3 Focus 2.0 ST250
Mk3 Focus 2.3 RS
Grand C-Max (1.0 EcoBoost, 1.5 EcoBoost, 1.5 TDCi, 1.6 EcoBoost, 1.6 TDCi, 2.0 TDCi) 2010 on.
Mk1 Kuga (2.0 TDCi) – 2008-2012
Mk2 Kuga (1.6 EcoBoost) – 2013 on.
Tourneo Connect (1.0 EcoBoost, 1.5 TDCi, 1.6 EcoBoost, 1.6 TDCi) – 2013 on.
Mk2 Transit Connect (1.0 EcoBoost, 1.5 TDCi, 1.6 EcoBoost, 1.6 TDCi) – 2013 on

MAZDA

3 Hatchback (1.6) – 2008-2013
3 Saloon (1.6) – 2008-2013
5 (1.6) – 2010 on.

VOLVO

C30 (1.6, 1.6 D, 1.8, 2.0, 2.0 D) – 2006-2012
C70 II Convertible (2.0 D) – 2008-2013
S40 II (1.6, 1.6 D, 1.8, 2.0, 2.0 D) – 2004-2012
V40 Hatchback (1.6 D, 1.6 T) – 2012 on.
V50 (1.6, 1.6 D, 1.8, 2.0, 2.0 D) – 2004-2012
V70 III (2.6 D) – 2009-2015