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K&N RC-1645 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   5.0 out of 5 stars   2 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 ShapeRound Tapered
Filter MaterialCotton Gauze
Flange Inside Diameter4.25 in (108 mm)
Flange Length0.844 in (21 mm)
Flange TypeCentered
Height6 in (152 mm)
Base Outside Diameter5.5 in (140 mm)
Top Outside Diameter5.344 in (136 mm)
Top StyleMetal
Top MaterialChrome
Package Contents1 Air Filter
Package Quantity1
Product StyleRound Tapered Universal Air Filter
Weight2.2 lb (1 kg)
Filter Re-Oiling Amount0.84 oz (25 ml)
Air Filter Large End Diameter5.5 in (140 mm)
Product Box Height7.13 in (181 mm)
Product Box Length7.06 in (179 mm)
Product Box Width7.06 in (179 mm)

K&N RC-1645 Universal Clamp-On Air Filter Product Reviews

Wednesday, January 25, 2017 - Part RC-1645
I've used a 57i kit on my rally car since I built her 5yrs ago and thanks to the K&N team for supplying me with a replacement filter, so the engine bay looked like new for The Autosport International Show 2017. After building and competing in rally cars for approx 25yrs, I wouldn't use anything else.

David Davies
North Wales
Thursday, December 26, 2013 - Part RC-1645
The filter represents good quality construction. Throttle response is noticeably improved on my supercharged 3800 engine. Initially the gas mileage was decreased. The computer system required a couple thousand miles and over a month to adjust and regain the gas mileage.

Lynn Hansch
Nisswa, Minnesota