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Upgrade your BMW M3 and M4 with the K&N 33-3171 High-Flow Replacement Air Filter, engineered to enhance engine performance and airflow. Crafted from layered, oiled cotton media, this washable and reusable filter is designed to maximize horsepower and provide superior engine protection. Its innovative design allows for increased air intake, which can lead to improved throttle response and overall vehicle performance. The filter is a direct drop-in replacement, ensuring easy installation into your factory air box without the need for additional modifications. Built for durability, it is engineered to last for the entire lifespan of your vehicle, backed by K&N's No-Hassle Lifetime Limited Warranty. This filter not only boosts engine efficiency but also offers cost savings over time by eliminating the need for frequent replacements, making it a smart choice for performance-minded drivers. As a product that is not CARB-verified, it is ideal for off-road or racing applications, ensuring you get the best airflow enhancement without compromising on quality. Invest in the K&N High-Flow Air Filter today to unlock the full potential of your BMW*s engine and enjoy a noticeable increase in power and responsiveness.
Features:
Fitment:
2021 BMW M3 Base
2021 BMW M3 Competition
2021 BMW M4 Base
2021 BMW M4 Competition
2021 BMW M4 Competition xDrive
2022 BMW M3 Base
2022 BMW M3 Competition
2022 BMW M3 Competition xDrive
2022 BMW M4 Base
2022 BMW M4 Competition
2022 BMW M4 Competition xDrive
2023 BMW M2 Base
2023 BMW M3 Base
2023 BMW M3 Competition
2023 BMW M3 Competition xDrive
2023 BMW M4 Base
2023 BMW M4 Competition
2023 BMW M4 Competition xDrive
2023 BMW M4 CSL
2024 BMW M2 Base
2024 BMW M3 Base
2024 BMW M3 Competition
2024 BMW M3 Competition xDrive
2024 BMW M3 CS
2024 BMW M4 Base
2024 BMW M4 Competition
2024 BMW M4 Competition xDrive
2024 BMW M4 CSL
Order Processing
All orders are processed and shipped within 24 hours of purchase (excluding weekends and holidays).
Orders placed after 3:00 PM EST may ship the following business day.
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Shipping times are determined by the carrier and cannot be guaranteed by us.
Tracking information will be provided once your order has shipped.
Shipping Coverage
If your package arrives damaged, please notify the delivery driver immediately and contact the shipping carrier to file a claim.
You must report any missing or damaged items within 14 days of delivery.
After this time, we cannot be held responsible for lost or damaged items.
Return Window
You have 30 days from the date of delivery to request a return.
After 30 days, we are unable to accept returns, exchanges, or refund requests.
Eligibility
Items must be returned in their original condition—unused, unwashed, and with all tags and packaging intact.
Certain products may not be eligible for return (e.g., special-order items, customized products, or perishable goods).
Items that have been altered, installed, or modified cannot be returned.
Return Process
Contact our Customer Support team to request a Return Authorization (RMA) before sending items back.
Once your return is approved, you’ll receive instructions on where to send the product.
Customers are responsible for return shipping costs unless the item was defective or incorrect.
Refunds
Refunds are issued to the original payment method once the returned item has been received and inspected.
Please allow 5–10 business days for the refund to appear on your account.
In some cases, a restocking fee may apply (if applicable, this will be disclosed during your return authorization).
