K&N Filter Universal Rubber Filter 3.25  Flange 5.5 Base 4.6875 Top 8 Height - K&N Engineering KNNRU-5122
K&N Filter Universal Rubber Filter 3.25  Flange 5.5 Base 4.6875 Top 8 Height - K&N Engineering KNNRU-5122
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K&N Filter Universal Rubber Filter 3.25 Flange 5.5 Base 4.6875 Top 8 Height

$ 104.99
$ 104.99

K&N RU-5122 universal clamp-on air filter features a 3.25 inch rubber flange 5.5 inch base 4.6875 inch top and 8 inch height for secure fit on intakes. Designed for racing vehicles generators snowmobiles tractors and cars like 2004-2011 Ford Crown Victoria Lincoln LS Mercury Grand Marquis Ford Thunderbird. Delivers more airflow for increased horsepower acceleration and engine performance while washable for long-term use.

Key Features

  • Rugged Construction: Durable premium materials and pliable rubber flanges absorb vibration stretch up to 116 inch for flexible fit.
  • 4 Layers of Protection: Multiple layers of premium cotton gauze with tacking agent create mesh media to trap contaminants and protect engine.
  • Engineered Power: Advanced media design increases airflow for better horsepower acceleration and overall engine response.
  • Clamp-on design uses existing or provided clamps on 3.25 inch flange.
  • Stretchable flanges fit in-between sizes up to 116 inch vibration absorption.
  • Proven leader in high-flow air filtration since 1969.

Fitment

Years Make Model Application
2004-2011 Ford Crown Victoria Fleet, LWB, LX, LX Sport, S
2003-2005 Ford Thunderbird 50th Anniversary Edition, Pacific Coast Roadster
2003-2006 Lincoln LS LSE, Sport, Ultimate
2004-2011 Mercury Grand Marquis GSL, Limited Edition, LS, Ultimate Edition

Specifications

Brand K&N Engineering
Manufacturer Part Number RU-5122
Product Type Air Filters - Universal Fit
Fitment Type Vehicle Specific
Condition New

What's Included

One new K&N air filters - universal fit identified by manufacturer part number RU-5122. Hardware, adapters, clamps, hoses, filters, and service supplies are included only when stated for this exact product.

About K&N Engineering

K&N develops reusable air filtration, intake, oil filtration, fuel filtration, and related performance products for vehicle-specific and dimensional applications.

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Frequently Asked Questions

How do I confirm K&N RU-5122 fits my vehicle?
Match the year, make, and model in the fitment table, then confirm the engine, factory housing, sensor layout, emissions notes, and any application restrictions stated for this exact part.

Is K&N RU-5122 washable and reusable?
Serviceability depends on the exact media used for this part number. Follow the K&N cleaning and oiling directions for this filter and never apply oil to media specified as dry.

What should be checked after installing K&N RU-5122?
Verify seals, clamps, fasteners, hoses, sensors, wiring, and surrounding clearance as applicable. Check for leaks or contact, then follow the manufacturer service and reinspection schedule.

Installation Instructions

  • Clamp-on design uses existing or provided clamps on 3.25 inch flange.
  • Stretchable flanges fit in-between sizes up to 116 inch vibration absorption.
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