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K&N 57S Performance Airbox Focus RS Mk3

Our Price: £183.32 (£219.98 inc vat)

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K&N's 57S Performance Airboxes 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 airboxes 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.

Part 57S-4000 Product Specifications

Product Style: 57i Series International Kits
Type: Gen I
Street Legal In All US States: No
TUV Approved (Europe): See Application Link Below
Weight: 4.2 lb (1.9 kg)
Product Box Length: 20 in (508 mm)
Product Box Width: 12 in (305 mm)
Product Box Height: 12 in (305 mm)

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