K&N Engineering RU-5122 Universal Rubber Air Filter, 3.25-Inch Flange

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: RC-5106DL Air Filter Wrap, 99-5000 Filter Care Service Kit Aerosol

• UNIVERSAL FITMENT: Designed for use on a variety of applications
• One Year Limited Warranty

The K&N Engineering RU-5122 Universal Rubber Air Filter is designed for a wide range of automotive, powersports, recreational, and equipment applications. Its universal design accommodates air-intake systems with varying angles and offset diameters, making it a practical choice for custom installations, racing vehicles, generators, snowmobiles, tractors, and other compatible equipment.

Constructed with a strong, pliable rubber flange, this K&N universal air filter helps absorb vibration while providing a secure connection to the intake tube. The flexible flange can stretch slightly to accommodate minor variations between sizes, supporting a dependable fit where standard filters may not be suitable. The reusable filter design can be cleaned and serviced rather than routinely replaced, helping simplify long-term maintenance.

The K&N Engineering RU-5122 features a 3.25-inch flange and is designed for applications requiring a universal rubber air filter configuration. Associated products include the K&N RC-5106DL Air Filter Wrap and 99-5000 Filter Care Service Kit Aerosol. This product is covered by a one-year limited warranty. It is not CARB approved; verify applicable emissions requirements before installation or use. Based on the available fitment data, the RU-5122 is listed for select 2004 and 2005 Ford Crown Victoria applications and select 2004 Mercury Grand Marquis applications.

Key Product Specifications and Technical Data

• Brand: K&N Engineering
• Part Number: RU-5122
• Filter Type: Universal rubber air filter
• Flange Size: 3.25 inches
• Base Diameter: 5.5 inches
• Top Diameter: 4.6875 inches
• Filter Height: 8 inches
• Serviceability: Washable and reusable

What's Included

• One K&N Engineering RU-5122 universal air filter

Features:

• Universal fitment: Designed for a variety of automotive, racing, powersports, recreational, and equipment applications.
• Flexible rubber flange: Helps absorb vibration, provides secure attachment, and accommodates slight fit variations.
• Washable and reusable: Can be cleaned and serviced for continued use with the appropriate K&N maintenance products.
• Application versatility: Suitable for compatible intake systems with varying angles and offset diameters.

Fitments:
2003 Ford Thunderbird Base
2003 Lincoln LS Base
2003 Lincoln LS LSE
2004 Ford Crown Victoria Base
2004 Ford Crown Victoria LWB
2004 Ford Crown Victoria LX
2004 Ford Crown Victoria LX Sport
2004 Ford Crown Victoria S
2004 Ford Thunderbird Base
2004 Ford Thunderbird Pacific Coast Roadster
2004 Lincoln LS Base
2004 Mercury Grand Marquis GS
2004 Mercury Grand Marquis LS
2005 Ford Crown Victoria Base
2005 Ford Crown Victoria LWB
2005 Ford Crown Victoria LX
2005 Ford Crown Victoria LX Sport
2005 Ford Crown Victoria S
2005 Ford Crown Victoria Special Edition
2005 Ford Thunderbird 50th Anniversary Edition
2005 Ford Thunderbird Base
2005 Lincoln LS Sport
2005 Lincoln LS Ultimate
2005 Mercury Grand Marquis GS
2005 Mercury Grand Marquis GSL
2005 Mercury Grand Marquis Limited Edition
2005 Mercury Grand Marquis LS
2005 Mercury Grand Marquis Ultimate Edition
2006 Ford Crown Victoria Base
2006 Ford Crown Victoria Fleet
2006 Ford Crown Victoria LWB
2006 Ford Crown Victoria LX
2006 Ford Crown Victoria LX Sport
2006 Lincoln LS Sport
2006 Mercury Grand Marquis GS
2006 Mercury Grand Marquis LS
2007 Ford Crown Victoria Base
2007 Ford Crown Victoria Fleet
2007 Ford Crown Victoria LWB
2007 Ford Crown Victoria LX
2007 Mercury Grand Marquis GS
2007 Mercury Grand Marquis LS
2008 Ford Crown Victoria Base
2008 Ford Crown Victoria Fleet
2008 Ford Crown Victoria LWB
2008 Ford Crown Victoria LX
2008 Mercury Grand Marquis GS
2008 Mercury Grand Marquis LS
2009 Ford Crown Victoria Fleet
2009 Ford Crown Victoria LWB
2009 Ford Crown Victoria LX
2009 Mercury Grand Marquis LS
2010 Ford Crown Victoria Base
2010 Ford Crown Victoria LX
2010 Mercury Grand Marquis LS
2011 Ford Crown Victoria Base
2011 Ford Crown Victoria LX
2011 Mercury Grand Marquis LS

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: false
Units Per Sku: 1