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Ships within 48 hours · Estimated delivery Jul 19 - Jul 24
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For Your Every Summer RSVP, with Code: SUMMER15
Description
K&N Universal Rubber Filter 3 inch 5 Degree FLG 4 1/2 inch OD 4 inch HeightDiscover the K&N Universal Rubber Air Filter, model RB 0900, designed to boost your engine's performance with optimal airflow and filtration. Its 3 inch inlet with a 5 degree flange angle ensures a versatile fit across various intake setups, making it an excellent choice for custom builds, kit cars, and performance upgrades. The filter features a durable rubber construction for optimum sealing and longevity. With an outer diameter of 4 1 2 inches and
Discover the K&N Universal Rubber Air Filter, model RB-0900, designed to boost your engine's performance with optimal airflow and filtration. Its 3-inch inlet with a 5-degree flange angle ensures a versatile fit across various intake setups, making it an excellent choice for custom builds, kit cars, and performance upgrades.The filter features a durable rubber construction for optimum sealing and longevity. With an outer diameter of 4 1/2 inches and a height of 4 inches, this filter offers compact dimensions suited for tight engine bays without sacrificing airflow efficiency.
K&N Engineering is renowned for quality and innovation in automotive air filtration, making this universal air filter a reliable upgrade for enthusiasts and workshops alike. Easy to install, maintain, and clean, it helps protect your engine from harmful contaminants while enhancing throttle response and engine sound.
Whether you are working on a hot rod, a V8 engine, or a custom project, the K&N Universal Rubber Filter RB-0900 delivers trusted performance and durability in a compact package.
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
4.1 ★★★★★
Based on 21 reviews
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Product Reviews
★★★★★ 5
Best liner socks EVER
Size: Medium, Color: (348) Silica Green / Silica Green / Hydro Green
I have them in every color and used to get them from Sams, but they stopped selling them and I was lucky to find them on Amazon. Got all colors again. They stay, it's all I'm gonna say! And don't show in any of my tennis shoes. Absolutely love them and wear them until they get holes. They last a LONG time too. They're on the thin side and my foot loves them because they tend to get hot. There's no shrinking, they wash great with exception of the white ones I couldn't manage to keep white - they turned a bit greyish.
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Reviewed in the United States on January 4, 2026
★★★★★ 5
Great socks
Size: Medium, Color: Pink - 647
Well-made and comfortable to wear. Great for golf and other outdoor activities. Like them because they do not show above shoes.
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Reviewed in the United States on April 19, 2026
★★★★★ 5
These ACTUALLY stay put all day long - I was skeptical, but am so glad I took a chance on these
Size: Medium, Color: (014) Halo Gray / Halo Gray / Castlerock
I was so skeptical about whether these would stay on my feet all day without sliding down into my shoe - I’ve tried so many socks in the past with the silicone strip on the heel which failed.
I’ve owned these for a couple months now and they have never slipped down - they stay put all day! I love the variety of colors to choose from, and the value per pack is great since six pairs come per pack (I thought it was only three when I first purchased and was pleasantly surprised by the additional pairs). They also have perfect thickness - not too warm to wear during the summer months with sneakers; I live in a tropical climate, though, so I’m not sure how they will do in cooler climates. I’ve washed each pair once or twice and the color and quality of the silicone has stayed so far (knock on wood).
Overall: high recommend based on my experience so far!
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Reviewed in the United States on September 13, 2025
★★★★★ 5
Great fit!
Size: Medium, Color: (403) Washed Navy / Washed Navy / Blue Smoke
Great quality!
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Reviewed in the United States on May 15, 2026
★★★★★ 5
My favorite socks
Size: Medium, Color: (659) Fuchsia Dusk / Fuchsia Dusk / Tourmaline Pink
Very comfortable. True to size. Moisture wicking
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Reviewed in the United States on April 25, 2026
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