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K&N Engineering  |  SKU: KNN57S-4000

K&N Performance Intake Kit for Ford C-Max/Focus II / Volvo C30/S40/V40/V50/V70 / Mazda 3/5

¥39,458
Shipping calculated at checkout.

Description
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.

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

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About K2 Industries

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Customer Reviews

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Let customers speak for us

from 199 reviews
Well worth it.

Just bought these clears for my mk7 and love them already. took under a hour to install and i feel like it was a much needed addition for my car. only thing i will say is if you buy them be aware that you have to take your reverse bulb out of your stock tail lights and put them into these (takes 30 seconds to get them out and put them in these new ones) follow my ig: dstagetwo ;)

Dawson Issac
VW MK7 Golf GTI Chrome/Clear LED Tail Lights (2012 - 2017)
Rear lights bmw e90

Absolutely incredible variants of modifications for lights, gadgets etc for all car specs!

Wolfy01
BMW 3 Series E90 Sedan Red / Chrome / Black LED Tail Lights (2005 - 2008)
Completely changed the look!

I love these headlights, I wouldn’t hesitate to buy them again if I got another truck my body style. Best looking headlights I’ve seen that they make for this truck.

Coltan Vice
Spec-D Full LED Headlights Chevy Silverado 1500 (2019-2021) Sequential LED Black Housing w/ Clear or Smoked Lens
Great purchase

Shopped on time, easy install, looks great! Would highly recommend!

Brittney Burriss
BMW 3 Series G20 DRL Module (2019+)

VW Golf 6th Gen Mk6 Hatchback LED Tail Lights (2008 - 2014)

Layne Coy
VW Golf 6th Gen Mk6 Hatchback LED Tail Lights (2008 - 2014)
Great little side marker!

GreEasy to install on my E46 M3 and it looks more modern with the LED lighting. Yes, the light does stay on for a minute (or two) after I un/lock it but it actually looks pretty cool. Definitely an easy modification to update your car's look.

Beemer Boii
BMW E38 7-Series E46 M3 Crystal Light Bar Clear/Smoke Lens Amber/White LED Side Marker Light (1995-2006)

If you buy these you have to program them to your car I have 06 325i

Steven Morales-Gonzalez
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Neville Mitchell
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Jay Morey
BMW E36 Sedan Custom Clear Tail Lights V3 (1992-1999)
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Glad that K2 offer this product. One of many carbon fiber parts that I want to add to my G80.

Joe Kelley
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A complete fresh look for my F20 with this blue DRL. I'm happy with the result with this upgrade!

Marion Khun
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Nice Upgrade

Fits like a glove! A sudtle race-inspired look for my G82.

Brandon Edwards
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Amazing Taillights

I absolutely love the product, they fit perfectly as if they are oem. I love the attention to detail

Sakir Hall
BMW 3 Series E90 Upgraded LED Tail Lights (2009 - 2011)
Beautiful Spoiler

The carbon fiber look is flawless! Had it installed for a week now and so far it's sturdy during high speeds. Worth the money, worth the wait!

Matthew Medina
BMW 2 Series G42 MP Style Carbon Fiber Spoiler (2022+)
Premium Interior Touch

This carbon fiber HUD cover added a high-end, sporty feel to my X4 M’s interior. The fit is precise, and the carbon fiber finish looks stunning. Small upgrade, big impact!

Vernon Mitchell
Toyota Supra Mk5 DRL Module (2019+)

Frequently Asked Questions

Why Buy from K2 Industries

What makes K2 Industries more than just a parts supplier?

We’re a team of USA-based car enthusiasts committed to helping you get your build right the first time. With our deep product knowledge and close relationships with trusted manufacturers, we ensure you receive high-quality parts that perform. We’re here to support you before, during, and after your purchase, providing personalized advice, part compatibility checks, and responsive customer service. When you buy from us, you’re joining a community that cares as much about your car as you do.

How do I know which parts are best for my car and goals?

Answer: Our team can provide personalized mod plans to match your performance and style goals. Whether you’re building for speed, aesthetics, or both, we’ll help you select the right parts for your vision. Contact us to discuss your project!

Do You Have Financing Options?

Answer: Yes, we offer flexible financing options to make it easier for you to upgrade your vehicle without paying the full amount upfront. Choose our financing option at checkout to split your purchase into manageable payments, so you can start your build now and pay over time.

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Shipping

Do you ship overseas?

Yes, we ship all over the world. Shipping costs will apply, and will be added at checkout. We run discounts and promotions all year, so stay tuned for exclusive deals.

How long will it take to receive my order?

It depends on where you are. Orders processed here will take 5-7 business days to arrive. Overseas deliveries can take anywhere from 7-16 days. Delivery details will be provided in your confirmation email.

Other

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