K&N 57i Series Induction Kits are specifically designed for each different vehicle and will free your car from the size restriction that comes with the factory air box. These economical kits can take a variety of different forms based on vehicle characteristics and available space under the hood. Each kit is designed to provide power throughout the RPM range. The extra surface area of these open-air air filters provide even more airflow at lower restriction than a K&N O/E replacement filter which is always limited to the size of the factory air box. The larger air filter also captures and holds more dirt increasing its service life before a cleaning is required (up to 100,000 miles). The filter is either directly attached to the engine carburetor or throttle body or indirectly through a tube assembly running from the filter to the engine. All adapters are made from high quality materials such as steel, aluminum, silicon or reinforced nylon to ensure long life. 57i Intakes are not legal for use in California and other US States adopting California emission standards.

• Guarante ed to increase horsepower
• Designed to improve throttle response and engine sound
• Replaces entire factory air intake system
• Washable and reusable lifetime air filter
• Easy to install, usually in 90 minutes or less

Specifications
Air Filter Height 6.344 in (161 mm)
Air Filter Material Cotton Gauze
Air Filter Outlet Shape Round
Clamp Material Stainless Steel
Clamp Style Regular
Clamps Included 1
Intake Pipe Color / Finish Black
Intake Pipe Material High-Density Polyethylene
Product Box Height 12 in (305 mm)
Product Box Length 22 in (559 mm)
Product Box Width 14 in (356 mm)
Product Style 57i Series International Kits
Replacement Filter RC-70031

Application
2009 FORD FOCUS II 2.5L L5 F/I - ST
2008 FORD FOCUS II 2.5L L5 F/I - All
2007 FORD FOCUS II 2.5L L5 F/I - All
2006 FORD FOCUS II 2.5L L5 F/I - All
2005 FORD FOCUS II 2.5L L5 F/I - All

Product Reviews for KN57I-2503 - K&N