K&N Engineering
K&N Universal Air Filter 4in Flange / 5-3/8in Base / 4-1/2in Top / 6in Height - RU-4550
- SKU:
- KNNRU-4550
- UPC:
- 024844373809
- MPN:
- RU-4550
- Availability:
- Regularly stocked product
Description
What is the flange size of the K&N Universal Air Filter?
The K&N Universal Air Filter features a 4 inch flange, contributing to its precise fit on a wide range of popular performance vehicles.
Is this K&N air filter easy to install?
Easily install this universal fit air filter using its pliable rubber flanges, simplifying your engine upgrade experience for maximum airflow.
K&N Universal Air Filters achieve a precise fit on a wide range of popular performance vehicles, scoring an 8 for Street Performance. Featuring a 4 inch flange and 6 inch height, this air filter ensures secure, vibration-resistant sealing. Trust K&N for exceptional durability and lasting engine performance.
Key Features
- 4in Flange
- 5-3/8in Base
- 4-1/2in Top
- 6in Height
- ultra-strong molded pliable rubber flanges
- can also be stretched for up to 1/16 of an inch (1.5mm)
Why Choose the KN Universal Air Filter
Delivers a secure, vibration-resistant seal for optimal engine protection.
Achieves a precise fit on a wide range of popular performance vehicles.
Provides exceptional durability and longevity for lasting performance.
Transforms installation with a flexible flange that adapts to your setup.
Who Is This For?
Street Performance — 8/10
Premium performance category and universal fitment for popular vehicles.
Track / Autocross — 7/10
Premium performance designation suggests track suitability.
Racing Competition — 7/10
Premium performance designation suggests competition suitability.
Engine Performance — 8/10
Premium performance category implies improved engine airflow.
Easy DIY Install — 9/10
Universal fit with pliable rubber flanges simplifies installation.
Visual / Aesthetic Upgrade — 6/10
Premium performance products often have aesthetic appeal.
Additional Resources
Important Notices
⚠️ CARB Notice: This product is NOT legal for street use in California under CARB (California Air Resources Board) regulations. For off-road or race use only.
⚠️ Proposition 65 Warning: This product can expose you to chemicals including lead and/or other substances known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, visit www.P65Warnings.ca.gov.
Additional Information
CARB: |
This product is not CARB Legal and not for sale in California |
Clearance Item: |
N |
MPN: |
RU-4550 |
Proposition 65: |
Y |
Case Lot Quantity: |
1 |
Category: |
Air Filters>Air Filters - Universal Fit |
Install Type: |
Universal Fit |
Product Level: |
Premium Performance |
Street Performance: |
8/10 |
Track / Autocross: |
7/10 |
Racing Competition: |
7/10 |
Engine Performance: |
8/10 |
Easy DIY Install: |
9/10 |
Visual / Aesthetic Upgrade: |
6/10 |
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