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SKU: 57S-4000 | UPC: 024844282903
K&N 57S-4000 Performance Air Intake Kit for Ford C-Max/Focus II / Volvo C30/S40/V40/V50/V70 / Mazda 3/5 (2005-2018)
The K&N 57S-4000 Performance Air Intake System replaces the restrictive factory air filter and air box lid on select Ford C-Max, Focus II, Volvo C30/S40/V40/V50/V70, and Mazda 3/5 models. It reduces air flow restriction while smoothing and straightening airflow to deliver more air to the engine for increased power and acceleration across the RPM range. This system includes an oversized conical high-flow air filter and injection molded air box lid built to last the life of the vehicle.
Key Features
- Power Gains: Allows engine to inhale larger volume of air than stock setup for noticeable torque and horsepower increases throughout RPM range
- Easy Installation: Bolts into existing air box base in 90 minutes or less using common tools with no vehicle modifications required
- Long Service Life: High-flow air filter lasts up to 100000 miles before cleaning depending on driving conditions
- Million Mile Limited Warranty: Backed by K&N for the lifetime of the vehicle
- Washable Reusable Filter: Lifetime conical filter cleans easily and provides consistent performance without replacement
Product Notes
- Replaces complete factory air box and filtration system
- Filter requires cleaning based on driving conditions not fixed interval
- Ships in protective box with all necessary components included
Installation Notes
- Professional installation recommended.
- Typically completes in 90 minutes or less with basic hand tools
- Direct fit using factory mounting points no cutting or drilling needed
This Part Fits
| Year | Make | Model | Submodel |
|---|---|---|---|
| 2013-2018 | Ford | C-MAX | Hybrid SE/SEL/Titanium, Energi SE/SEL/Titanium |
| 2013-2018 | Ford | Focus | ST |
| 2013-2015 | Ford | Focus | Titanium/S |
| 2016-2018 | Ford | Focus | RS |
| 2014-2016 | Ford | Transit Connect | XL/XLT/Titanium |
| 2008-2013 | Volvo | C30 | 2.0L |
| 2005-2011 | Volvo | S40 | 2.0L/2.4L |
| 2005-2011 | Volvo | V50 | 2.0L/2.4L |
| 2008-2011 | Volvo | V70 | 2.0L/2.4L |
| 2013-2016 | Volvo | V40 | 2.0L |
| 2009-2013 | Mazda | 3 | 2.0L |
| 2012-2015 | Mazda | 5 | 2.0L |
Why Choose K&N?
- Proven designs increase airflow and engine performance since 1969
- High-quality materials ensure durability and consistent power delivery
- Precision engineering matches exact vehicle air box specifications
Frequently Asked Questions
-
Q: Will this fit my 2015 Ford Focus?
A: Yes for 2.0L models including S Titanium ST verify exact submodel in fitment table -
Q: What is the air filter made of?
A: Oiled cotton gauze media in conical design for maximum airflow washable with K&N cleaning kit -
Q: What does the warranty cover?
A: Million Mile Limited Warranty covers defects in materials workmanship for vehicle life when installed maintained properly
Shipping & Handling
- Method: UPS or FedEx Ground
- Availability: In stock - ships same or next business day
- Packaging: Original box 20.75 x 13.25 x 13.25 inches
- Weight: 8.55 lbs
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