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K&N RX-4990 5.0 out of 5 stars 1 Customer Review
Universal Air Filters > Universal X-Stream Clamp-On

 List Price: $110.60
Your Price: $74.99

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RX-4990
 
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K&N XStream Top Universal Air Filters take performance to the next level with the addition of a filter within the filter's top adding more filter area for higher air flow and a longer service interval. The XStream Air Filter provides awesome air flow and outstanding filtration. When racing, in any environment, racers need all the protection and airflow they can get. K&N delivers. All K&N universal air 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 inch (1.5mm) to fit in-between sizes. K&N universal air filters are washable and reusable.

[More Information on XStream Top Air Filters]
  • Pleated filter built in top
  • Washable and reusable
  • Low restriction
  • Clamp-on design
Available Information
Installation Instruction Sheet
Installation Instruction Sheet
News Story - Add 11 + Horsepower to Ford Focus with K&N's 57-Series FIPK


Part RX-4990 Product Specifications
Product Style: Round Tapered Universal Air Filter
Air Filter Shape: Round Tapered
Air Filter Large End Diameter: 6 in (152 mm)
Base Outside Diameter: 6 in (152 mm)
Top Outside Diameter: 5 in (127 mm)
Flanges: 1
Flange Inside Diameter: 3 in (76 mm)
Flange Length: 1.75 in (44 mm)
Flange Type: Centered
Height: 5.563 in (141 mm)
Filter Material: Cotton Gauze
Top Style: X-Stream
Top Material/Finish: None
Package Contents: 1 Air Filter
Package Quantity: 1
Filter Re-Oiling Amount: 0.96 oz (28 ml)
Footnote 1: 1/4-20 Jack Nut Inserted Into Filter Top
Weight: 1.5 lb (0.7 kg)
Product Box Length: 6.81 in (173 mm)
Product Box Width: 6.81 in (173 mm)
Product Box Height: 7.75 in (197 mm)



Product Reviews      Review part RX-4990

 Reduces intake noise and keeps particles and bugs out of the crevasses which significantly reduces your cleaning efforts. I've owned four of these systems on various cars and wouldn't operate without a filter wrap.
Jeff, North Carolina
 Great Product!
Leo C., New York
 Works awesome ..without it my car kept sucking up water and killed the motor.
Theron, Ohio