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K&N RF-1040 Universal Clamp-On Air Filter

Universal Air Filters > Universal Clamp-On Air Filter
Rating Star 1 Rating Star 2 Rating Star 3 Rating Star 4 Rating Star 5   4.8 out of 5 stars   5 Customer Reviews
  • Designed to increase horsepower and acceleration
  • Hundreds of sizes and shapes for most applications
  • High air flow with excellent filtration
  • Clamp-on washable and reusable air filter
  • Malleable flanges
  • One year limited warranty
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.

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Product Specifications

Air Filter ShapeOval Straight
Base Outside Length9 in (229 mm)
Base Outside Width5.75 in (146 mm)
Filter MaterialCotton Gauze
Filter Re-Oiling Amount2.6 oz (77 ml)
Flange Inside Diameter4 in (102 mm)
Flange Length1.5 in (38 mm)
Flange TypeCentered
Height7.5 in (191 mm)
Package Contents1 Air Filter
Package Quantity1
Product Box Height9.75 in (248 mm)
Product Box Length9.38 in (238 mm)
Product Box Width9.38 in (238 mm)
Product StyleOval Tapered Universal Air Filter
Top Material/FinishStainless Steel
Top Outside Length7 in (178 mm)
Top Outside Width4.5 in (114 mm)
Top StyleMetal
Weight2.8 lb (1.3 kg)

K&N RF-1040 Universal Clamp-On Air Filter Product Reviews

Monday, August 8, 2016 - Part RF-1040
I bought this filter as back-up for my K&N Air Intake system so I have a clean one ready to put-in. Then I can take my time cleaning the dirty one. Delivery time was a little slow, however it was free, so I can't really complain.

Lawrence Swanberg
Victorville, California
Monday, May 23, 2016 - Part RF-1040
Truck runs like new, more mpg. I am extremely happy.

Isaac Santana
Rialto, California
Monday, May 9, 2016 - Part RF-1040
As always, the Customer Service was great. I install the Filter on my 2007 Dodge Ram Quad Cab long bed Pickup Truck. I changed the OEM air intake 2010. The system has provided the performance as advertised. I am very satisfied with my decision to make the change.

Wayne Gilmore
Belton, South Carolina
Wednesday, January 20, 2016 - Part RF-1040
This replaced my original K&N I installed February 2004. 12 years, 6 in Tennessee and 6 in Florida and 130000 miles. I love my cold air intake!

William Skipper
Melbourne, Florida
Monday, August 18, 2014 - Part RF-1040
Good, fast shipping. This replaces an old RF-1040 that wore through due to the previous owner improperly installing the cold air intake.

New York