Shipping Estimate
USA
- USA
- CAN
- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 15 - Jul 20
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For Your Every Summer RSVP, with Code: SUMMER15
Description
K&N 01-09 Audi A4/RS4/S4 Drop In Air FilterExperience enhanced engine performance with the K&N 01 09 Audi A4 RS4 S4 Drop In Air Filter. Designed specifically for Audi models ranging from 2001 to 2009, this precision engineered component provides superior airflow while effectively filtering out contaminants. Crafted by K&N Engineering, a trusted name in high performance automotive parts, this drop in replacement filter offers easy installation and reliable durability. Featuring advanced
Experience enhanced engine performance with the K&N 01-09 Audi A4/RS4/S4 Drop In Air Filter. Designed specifically for Audi models ranging from 2001 to 2009, this precision-engineered component provides superior airflow while effectively filtering out contaminants. Crafted by K&N Engineering, a trusted name in high-performance automotive parts, this drop-in replacement filter offers easy installation and reliable durability.Featuring advanced filtration technology, the K&N drop-in air filter not only boosts horsepower but also improves throttle response, making it an essential upgrade for enthusiasts and professionals alike. Its reusable design allows for cleaning and re-oiling, providing long-term value and environmental benefits over disposable filters.
Whether you're tuning your vehicle for daily driving or preparing it for motorsport activities, this air filter stands out with its robust construction and consistent performance. Benefit from Tuningsupply's commitment to fast shipping and competitive pricing, ensuring you get the best parts without hidden fees or delays.
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
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
4.3 ★★★★★
Based on 790 reviews
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Product Reviews
★★★★★ 4
Not bulky fit
Size: Large, Color: (009) Gray Dawn / White / Prime Pink
Thinner than UA other cushioning run socks, but this fit is perfect and doesn't shift in my shoe. I wear a women's 9.5 and determined Large doesn't squeeze my foot like Medium size (too exact). Bonus... avaliable olors beyond black and Grey.
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Reviewed in the United States on October 2, 2025
★★★★★ 5
Comfortable
These are very comfortable to wear
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Reviewed in the United States on January 3, 2026
★★★★★ 5
Love these socks!
The wife struggles with socks. She only like the Nike ones, then they discontinued them, so had to start the search again! Found these, they are expensive just like the Nike, but the size is true, they look great, they are super soft and stretchy. They are light weight and breathable and seem to wick away moisture. She loves these!
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Reviewed in the United States on November 18, 2025
★★★★★ 5
Good, Comfortable Fit
Size: Medium, Color: (100) White / White / Black, Number of Items: 6, Size: Medium, Color: (100) White / White / Black, Number of Items: 6
I wear a women’s size 9.5 and I got a size Medium. They fit perfect, they aren’t super heavy, but have cushion where needed. Perfect for my steel toe boots
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Reviewed in the United States on May 28, 2026
★★★★★ 5
Son loves them!
Size: Large, Color: Black (6-pairs), Number of Items: 6
My son loves these socks! Comfy, good quality.
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Reviewed in the United States on May 20, 2026