1 2
  • Photo - Primary
  • Photo - lifestyle view
  • User 4
  • Photo - Unmounted
  • Photo - in package
  • Photo - in package
  • Photo - in package
  • User 4
  • Photo - in package
  • Photo - out of package
  • Photo - in package
  • Photo - in package
  • Technical Drawing
  • Logo Image

K&N Universal Air Filter 4in Flange / 5-3/8in Base / 4-1/2in Top / 6in Height

K&N Universal Air Filter 4in Flange / 5-3/8in Base / 4-1/2in Top / 6in Height

KNNRU-4550

⚠️ CARB Compliance: This product is not CARB-approved and cannot be shipped to California or other carb restricted states. See our Privacy Policy »
$78.99
$78.99
Request Price Match
  • Fully secure checkout
  • Trusted by thousands
  • Rated and reviewed
K&N's Universal Air Filters are designed and manufactured for a wide variety of applications including racing vehicles, radio-controlled cars, generators, snowmobiles, tractors, and other applications. Regardless of the angle or offset diameter of the air intake, there is probably a K&N Universal air filter for your equipment. All filters are constructed with ultra-strong molded pliable rubber flanges which absorb vibration and allow for secure attachment and can also be stretched for up to 1/16 of an inch (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable.

This Part Fits:

Year Make Model Submodel
2001-2002 BMW 525i Base
1999-2000 Honda Civic CX
1999-2000 Honda Civic DX
1999-2000 Honda Civic EX
1999-2000 Honda Civic GX
1999-2000 Honda Civic HX
1999-2000 Honda Civic LX
1999-2000 Honda Civic Si
1999 Honda Civic Value Package
2009 Mazda MX-5 Miata Grand Touring
2009 Mazda MX-5 Miata Sport
2009 Mazda MX-5 Miata SV
2009 Mazda MX-5 Miata Touring
2002 Mini Cooper S
2004 Volkswagen Golf GTI VR6
MPN: RU-4550
⚠️ Proposition 65 Warning: This product may contain chemicals known to the State of California to cause cancer, birth defects, or other reproductive harm. Learn more »
K&N Universal Air Filter 4in Flange / 5-3/8in Base / 4-1/2in Top / 6in Height

$78.99

FAQ

When does my order ship?

Most orders ship in 1–3 days, but some items may take longer due to demand and manufacturing delays. For urgent orders, please contact us to confirm stock before purchasing.

Are returns accepted?

Not satisfied? Return any item within 30 days. See our FAQ page for details.

Buy now pay later options available?

Yes. Pay later in installments with Affirm or PayPal Pay Later.

Do we offer price matching?

We’re happy to price match any legitimate listing from an authorized dealer, as long as the item is in stock and the price is current. We cannot match outdated or incorrect discounts based on old MSRP, since those prices are often errors the competitor cannot honor.