K&N Engineering 57S-4000 Performance Airbox for Ford Focus, C-Max, Volvo, Mazda 3/5

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.

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

Upgrade your vehicle's airflow with the K&N 57S-4000 Performance Airbox, designed specifically for certain Ford, Volvo, and Mazda models. This airbox replaces the factory restrictive air filter and lid, offering a significant reduction in airflow restriction. Its design features an injection-molded lid embossed with the K&N logo and an oversized conical high-flow air filter, which allows your engine to breathe more freely and efficiently. The result is increased horsepower and torque across the engine's RPM range, providing better acceleration and overall performance. Installation is straightforward with commonly available tools, making it a popular choice for enthusiasts seeking a reliable upgrade that lasts for the life of the vehicle. The durable construction and high-quality materials ensure long-term performance, backed by K&N's Million Mile Limited Warranty. This performance airbox is compatible with vehicles such as the 2013 and 2014 Ford Focus, 2013 Ford C-Max, and select Volvo and Mazda models, enhancing airflow without the need for extensive modifications. Designed to meet or exceed industry standards, some models are compliant with the latest TUV emissions and sound regulations, although not all are CARB approved. Regular maintenance involves servicing the included high-flow filter approximately every 100,000 miles under typical driving conditions, ensuring sustained performance without frequent replacements. This system is an ideal upgrade for drivers seeking increased power, improved throttle response, and a durable, long-lasting air intake solution that is backed by a trusted brand. Whether you're looking for a straightforward installation or a performance boost, the K&N 57S-4000 Performance Airbox offers a reliable, high-quality upgrade for your vehicle's intake system.

Features:

• Replaces factory air filter and lid to reduce airflow restriction

• Includes oversized high-flow conical K&N air filter for increased airflow

• Injection-molded air box lid with embossed K&N logo for durability

• Designed to improve horsepower and acceleration throughout RPM range

• Easy installation with common tools, tailored for specific Ford, Volvo, and Mazda models

• Constructed for long-lasting performance backed by K&N's Million Mile Limited Warranty

• Servicing interval of approximately 100,000 miles depending on driving conditions

• Some models compliant with TUV emissions and sound regulations

Fitment:
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