K&N Engineering RU-3700 Universal Round Tapered Air Filter

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. Regardless of the angle or offset diameter of an air intake, there is probably a K&N Universal air filter for your equipment. K&N universal air filters are washable and reusable. Associated products: 99-5000 Filter Care Service Kit Aerosol

• NO-HASSLE WARRANTY: 1-Year Limited Warranty
• One Year Limited Warranty

The K&N Engineering RU-3700 Universal Round Tapered Air Filter is designed for a broad range of automotive, powersports, equipment, and specialty applications. Its tapered design supports air intake systems with varying inlet configurations, making it a practical choice for racing vehicles, generators, snowmobiles, tractors, radio-controlled cars, and other compatible equipment. The filter is engineered to provide dependable air filtration while supporting efficient airflow for many custom and replacement installations.

A molded, pliable rubber flange helps absorb vibration and provides a secure connection to the intake tube. The flexible flange can accommodate slight variation between intake sizes, helping simplify installation when an exact intermediate size is not available. As a washable and reusable filter, the K&N RU-3700 can be cleaned and returned to service with the appropriate filter care products, including the K&N 99-5000 Filter Care Service Kit Aerosol.

Key Product Specifications & Technical Data:
Brand: K&N Engineering
Part Number: RU-3700
Product Type: Universal automotive air filter
Filter Shape: Round tapered
Top Opening: 4.625 inches outside diameter
Base Opening: 5 inches outside diameter
Filter Height: 4 inches
Flange Material: Molded pliable rubber
Serviceability: Washable and reusable

Fitment: Listed fitment includes 2007-2011 Nissan Sentra applications. Verify intake configuration and application requirements before installation, as this is a universal filter rather than a vehicle-specific replacement. This product is not CARB approved, and applicable emissions requirements should be confirmed before use.

What's Included: One K&N Engineering RU-3700 Universal Round Tapered Air Filter. Backed by a one-year limited warranty. California Proposition 65 warning may apply.

Features:

• Universal Compatibility: Designed for a wide variety of automotive, racing, powersports, equipment, and specialty air intake applications.
• Tapered Round Design: Supports intake systems with different inlet configurations and custom installation requirements.
• Flexible Rubber Flange: Molded pliable rubber helps absorb vibration, improve connection security, and accommodate slight size variation.
• Washable and Reusable: Can be cleaned and serviced for continued use with compatible K&N filter care products.

Fitments:
2007 Nissan Sentra SE-R
2007 Nissan Sentra SE-R Spec V
2008 Nissan Sentra SE-R
2008 Nissan Sentra SE-R Spec V
2009 Nissan Sentra SE-R
2009 Nissan Sentra SE-R Spec V
2010 Nissan Sentra SE-R
2010 Nissan Sentra SE-R Spec V
2011 Nissan Sentra SE-R
2011 Nissan Sentra SE-R Spec V

Air Freight Prohibited: false
Not Carb Approved: true
Carb Acknowledgement Required: true
Ltl Freight Required: false
Prop 65: Y
Part Type: automotive
Epa: N/A
Regular Stock: t
Units Per Sku: 1