


K&N Performance Intake Kit for Ford C-Max/Focus II / Volvo C30/S40/V40/V50/V70 / Mazda 3/5
Marsoni
M251S
Get it in 3 business days with 1 day shipping.
Friday, May 29
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
Quick Dispatch:
Your K&N Performance Intake Kit for Ford C-Max/Focus II / Volvo C30/S40/V40/V50/V70 / Mazda 3/5 orders ship within 1-2 business days.
Delivery Options:
- Standard: 3-7 business days
- Fast: 2-3 business days
- Express: 1-2 business days
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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
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4.9 ★★★★★
Based on 594 reviews
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Product Reviews
★★★★★ 1
Disappointment
States 14kt and it’s not. Doesn’t appear to be what was advertised. Very pretty though.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on December 26, 2024
★★★★★ 1
Is not 14K
Read description carefully. Is not 14K. Is gold plated.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on July 28, 2025
★★★★★ 5
Muy bello
Es como esperaba y aun mejor
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on November 5, 2024
★★★★★ 5
Simple and Elegant
Color: White Gold - 3.5 mm, Ring Size: 8
I was looking for a band that would match my white gold engagement ring. This is it.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on May 27, 2026
★★★★★ 5
Thick, true fit, comfortable, and perfect!
Color: White Gold - 3.5 mm, Ring Size: 6.4, Color: White Gold - 3.5 mm, Ring Size: 6.4
Excellent price gorgeous comfortable fit, thick and beautiful
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Reviewed in the United States on April 3, 2026