K&N Custom Round Air Filter 14in OD 12in ID 4in Height

K&N Custom Round Air Filter 14in OD 12in ID 4in Height

Marsoni

M251S

$83.99

Get it in 3 business days with 1 day shipping. Friday, May 29

K&N Custom Round Air Filter 14in OD 12in ID 4in HeightSKU: E 3730 UPC: 024844019899 K&N E 3730 Custom Round Air Filter 14in OD 12in ID 4in Height The K&N E 3730 is a high flow custom round air filter with 14 inch outer diameter 12 inch inner flange diameter and 4 inch height perfect for custom air intake setups and compatible factory air boxes. Layered oiled cotton gauze media allows more air into the engine for power gains while trapping dirt and debris. Washable and reusable it lasts the life of your

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Love this brand and have a lot of their apparel like shorts, polos, pants, and pullovers. This is now my favorite by Maelreg. Incredibly soft, great color selection, has some weight to it, and fleece lining provides warmth on cold winter days but not to the point of sweating and discomfort. Excellent fit too. I usually wear M but the S fits perfectly. Great deal right now as well at $19.99 for some colors in my size. Just wish they didn’t put brand name on back of collar. A logo would have been better or nothing at all. But not a dealbreaker. Purchased several of these now.

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Reviewed in the United States on January 28, 2025

Verified Purchase

Corbin

Houston, US

★★★★★ 5

Quality

Color: Black Heather, Size: X-Large

Great fit and very high quality for the price

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Reviewed in the United States on January 22, 2026

Verified Purchase

Gary31

Whiting, US

★★★★★ 5

Awesome quality!

Color: Lavender Heather, Size: Medium

Great quality, well made, midweight, and very soft inside. I bought 2 differnet colors. Very happy with the quality of MAELREG and will keep buying their products.

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Reviewed in the United States on November 22, 2025