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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Arrow is AIRFLOW direction, not UP direction. So installation direction might mean arrow of your Purolator filter should be down (true for glove box installs) even if arrow on old filter is up (if it was an UP indication). I wish they mentioned this in product listing, on box, or on side of filter like most brands. Luckily, telephone customer service was super responsive. Otherwise, product is correct size, appears sturdily made.

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Reviewed in the United States on May 30, 2025

Verified Purchase

Raquel Santos

Phoenix, US

★★★★★ 5

Great item

Size: 2.0L

This fit my car perfectly! It was was easy to install as well. Great price as well.

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Reviewed in the United States on March 25, 2026