K&N 57S Style Replacement Filter – Focus RS Mk3





K&N’s replacement air filters are designed to increase horsepower and acceleration while providing excellent filtration. They make over 1,200 different replacement air filters for virtually every vehicle on the road. These filters are washable and reusable and are custom designed to fit into your existing factory air box. Their drop-in design means adding performance is simple. With most vehicles you simply remove the disposable air filter and replace it with a K&N. Our stock replacement air filters for street vehicles are covered by our famous K&N Million-Mile Limited Warranty™ and will be THE LAST AIR FILTER YOUR VEHICLE WILL EVER NEED.

This should be one of your first mods if you aim to tune your Focus RS Mk3. Many additional mods will require the improved air-flow this unit has to offer

It also features a removable bung in the end of the filter to allow for more noise if required

Part E-9289 Product Specifications

Air Filter Large End Diameter 5.719 in (145 mm)
Air Filter Shape Round Reverse Tapered
Base Outside Diameter 5.75 in (146 mm)
Filter Material Cotton Gauze
Filter Re-Oiling Amount 1.05 oz (31 ml)
Flange Inside Diameter 2.75 in (70 mm)
Flange Length 0.438 in (11 mm)
Flange Type Centered
Flanges 1
Height 7.688 in (195 mm)
Package Contents 1 Air Filter
Package Quantity 1
Product Box Height 9 in (229 mm)
Product Box Length 7.25 in (184 mm)
Product Box Width 7.25 in (184 mm)
Product Style Round Tapered Universal Air Filter
Top Material/Finish None
Top Outside Diameter 5.938 in (151 mm)
Top Style Plastic
Weight 1.2 lb (0.5 kg)

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