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Ships within 48 hours · Estimated delivery Jul 30 - Aug 4
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Description
K&N Performance Intake Kit for Ford C-Max/Focus II / Volvo C30/S40/V40/V50/V70 / Mazda 3/5The 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
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.Installation Instructions
Installation Instructions
This Part Fits:
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2017 | Ford | C-Max | Energi SE |
| 2013-2016 | Ford | C-Max | Energi SEL |
| 2017 | Ford | C-Max | Energi Titanium |
| 2013-2017 | Ford | C-Max | Hybrid SE |
| 2013-2016 | Ford | C-Max | Hybrid SEL |
| 2017 | Ford | C-Max | Hybrid Titanium |
| 2016-2018 | Ford | Focus | RS |
| 2013-2015 | Ford | Focus | S |
| 2013-2015 | Ford | Focus | SE |
| 2013-2018 | Ford | Focus | ST |
| 2013-2015 | Ford | Focus | Titanium |
| 2014-2016 | Ford | Transit Connect | Titanium |
| 2014-2016 | Ford | Transit Connect | XL |
| 2014-2016 | Ford | Transit Connect | XLT |
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
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Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.7 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Will buy again
Size: XX-Large, Color: White
Very comfortable. Fits as expected,
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Reviewed in the United States on September 15, 2025
★★★★★ 5
Nice sweatshirt
Color: White, Size: Small
Really happy with this sweatshirt. The material is soft, warm, and has a nice thickness without feeling bulky—perfect for crisp fall days and layering in winter. The quilted texture and mock neck give it a more polished, upscale look than a regular sweatshirt. Fits true to size, and the color is vibrant and unique. I like the quarter-snap buttons and chest pocket for a little extra style and function. Easy to dress up or down with jeans or boots, and works great for everyday wear or going out. Definitely a solid addition to a fall/winter wardrobe.
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Reviewed in the United States on January 4, 2026
★★★★★ 5
Get one!
Color: Army Green, Size: X-Large
Really nice! My husband is tall and this is actually long enough for him! He really likes it!
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Reviewed in the United States on April 14, 2026
★★★★★ 5
Buy it!!! Do not skip on this sweater
Color: Dark Grey, Size: XX-Large
I bought this for my husband to wear if he needed something nicer in the cold weather . But i have wore it more than him because how amazing it is. First off the material is such great quality, it is hard to explain that its thick/ dense but not thick.. the sweater is thin, light and wonderful yet feels thick good quality. It did not shrink when washed, fits wonderfully and color has stayed strong as well. It looks high quality and is an amazing value for the price. No one would know it was not name brand. Do not skip on this sweater.
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Reviewed in the United States on October 16, 2025
★★★★★ 5
Great mix of style and comfort.
Color: White, Size: Large
My husband gets compliments every time he wears it. Is holding up well in the laundry, too.
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Reviewed in the United States on February 11, 2026