K&N® washable, reusable High-Flow Air Filters™ feature a state-of-the-art design of layered, oiled cotton media engineered to improve airflow and capture contaminants, and are designed to provide an increase in horsepower. Each performance air filter is reusable, engineered to last for the entire lifespan of your vehicle, and backed by K&N’s 10-Year/Million Mile Limited Warranty. K&N drop-in replacement filters are designed to install easily into your factory air box. Upgrade today and start enjoying superior airflow and superior performance from K&N’s most popular product!


Designed to increase horsepower

Washable, reusable, and engineered to last for the life of your vehicle

Designed to provide high airflow and exceptional filtration

Engineered to fit easily into your factory air box

10-Year/Million Mile Limited Warranty

Only needs cleaning every 50,000 miles under normal highway driving conditions

Emissions legal in all 50 States

Will not void vehicle warranty


Filter Material Cotton Gauze

Height 4 in (102 mm)

Inner Wire Yes

Inside Diameter 12 in (305 mm)

Outside Diameter 14 in (356 mm)

Top Style Open

Top Material None

Air Filter Shape Round

Flanges None

Package Contents 1 Air Filter

Package Quantity 1

Warranty 1,000,000 Miles/10 Year

Washable Yes

Product Style Round Air Filter

Air Filter Outlet Shape Not Flanged

Weight 2.9 lb (1.3 kg)

Filter Re-Oiling Amount 2.31 oz (68 ml)

More Information
Part Type Air & Fuel Delivery
Product Line Air Cleaners & Accessories, Elements
Brand K&N
Write Your Own Review
You're reviewing:K&N Round Air Filter 14X4 #E3750
Your Rating