K&N 57S-4000 Performance Airbox Intake Kit for Ford Focus, C-Max, Mazda 3, Mazda 5, and Volvo Applications

The K&N 57S-4000 Performance Airbox replaces the restrictive factory air filter and air box lid. K&N performance air boxes are designed to dramatically reduce air flow restriction as well as smooth and straighten air flow. This allows your engine to inhale a larger amount of air than the factory air filter assembly. More air means more usable power and acceleration throughout the engine's RPM range. The 57S-4000 Performance Airbox comes with an oversized conical K&N high-flow air filter and an injection molded air box lid with the K&N logo embossed on top. The air filter can be used for up to 100,000 miles before servicing is needed depending on driving conditions. This performance air box is relatively easy to install into the air box base with commonly available tools. K&N builds these air box systems to last for the life of your vehicle and they are backed by K&N's Million Mile Limited Warranty. Some K&N 57S Series Performance Airboxes are compliant with the latest TUV emissions and sound regulations. Check the K&N catalog or website for vehicle applications and specific TUV status for each vehicle and air intake. K&N's easy-to-install performance air box replaces the restrictive factory air filtration system delivering a guaranteed power gain. This power boosting air intake comes with K&N's famous Million Mile Limited Warranty. Associated products: E-9289 Replacement Air Filter, 99-5000 Filter Care Service Kit Aerosol

• K&N Million Mile Limited Warranty
• Million Mile Limited Warranty

The K&N 57S-4000 Performance Airbox replaces the restrictive factory air filter and airbox lid to improve airflow into the engine. Its oversized conical K&N high-flow air filter and injection-molded airbox lid are designed to reduce airflow restriction while smoothing and straightening the incoming air stream. The result is increased air volume for improved acceleration and more usable power throughout the engine’s RPM range.

Designed for relatively easy installation using commonly available tools, the K&N 57S-4000 installs into the factory airbox base and is built for long-term service. The reusable air filter can go up to 100,000 miles between servicing intervals, depending on driving conditions, and the complete system is backed by K&N’s Million Mile Limited Warranty. The airbox lid features an embossed K&N logo for a finished, performance-oriented appearance.

This intake kit fits select 2013–2014 Ford Focus and 2013 Ford C-Max applications, along with select Mazda and Volvo vehicles. Confirm application details before installation. The kit is not CARB approved and may not be legal for use on pollution-controlled vehicles in all areas. Associated service products include the K&N E-9289 Replacement Air Filter and 99-5000 Filter Care Service Kit Aerosol.

What's Included

• Injection-molded K&N performance airbox lid
• Oversized conical K&N high-flow air filter
• Installation components required for the applicable vehicle

Fitment

Fits select 2013–2014 Ford Focus, 2013 Ford C-Max, Mazda 3, Mazda 5, and Volvo C30, S40, V40, V50, and V70 applications. Verify the vehicle year, engine, and application before ordering.

Features:

• Reduced Airflow Restriction: Replaces the restrictive factory air filter and airbox lid to help the engine draw in more air.
• Improved Airflow Quality: The molded airbox design helps smooth and straighten incoming airflow for consistent engine performance.
• High-Flow Reusable Filter: Includes an oversized conical K&N air filter that can be serviced and reused for up to 100,000 miles, depending on driving conditions.
• Long-Term Performance Design: Built for the life of the vehicle and supported by K&N’s Million Mile Limited Warranty.

Fitments:
2013 Ford C-Max Energi SEL
2013 Ford C-Max Hybrid SE
2013 Ford C-Max Hybrid SEL
2013 Ford Focus S
2013 Ford Focus SE
2013 Ford Focus ST
2013 Ford Focus Titanium
2014 Ford C-Max Energi SEL
2014 Ford C-Max Hybrid SE
2014 Ford C-Max Hybrid SEL
2014 Ford Focus S
2014 Ford Focus SE
2014 Ford Focus ST
2014 Ford Focus Titanium
2014 Ford Transit Connect Titanium
2014 Ford Transit Connect XL
2014 Ford Transit Connect XLT
2015 Ford C-Max Energi SEL
2015 Ford C-Max Hybrid SE
2015 Ford C-Max Hybrid SEL
2015 Ford Focus S
2015 Ford Focus SE
2015 Ford Focus ST
2015 Ford Focus Titanium
2015 Ford Transit Connect Titanium
2015 Ford Transit Connect XL
2015 Ford Transit Connect XLT
2016 Ford C-Max Energi SEL
2016 Ford C-Max Hybrid SE
2016 Ford C-Max Hybrid SEL
2016 Ford Focus RS
2016 Ford Focus ST
2016 Ford Transit Connect Titanium
2016 Ford Transit Connect XL
2016 Ford Transit Connect XLT
2017 Ford C-Max Energi SE
2017 Ford C-Max Energi Titanium
2017 Ford C-Max Hybrid SE
2017 Ford C-Max Hybrid Titanium
2017 Ford Focus RS
2017 Ford Focus ST
2018 Ford Focus RS
2018 Ford Focus ST

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1