K&N RC-0650 | Triumph Herald Air Filter

Part Number
Universal Clamp-On Air Filter

Fits: 68-70 Triumph Herald

Special Price $63.74 Regular Price $74.99
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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.
  • One Year Limited Warranty
  • Universal Clamp-On Air Filter
  • High Air Flow With Excellent Filtration
  • Malleable Flanges
  • Clamp-On Washable and Reusable Air Filter
  • Designed To Increase Horsepower And Acceleration
  • Universal Clamp-on Air Filter


Automotive Item GradeHigh Performance
CARB/Air Horn Diameter2.250 in.
Filter MaterialCotton Gauze
Filter Re-Oiling Amount0.47 oz (14 ml)
Flange Angle0 Degree
Flange Inside Diameter2.250 in. (57mm)
Flange Length0.625 in. (16mm)
Flange Offset0.813 in. (21mm)
Flange TypeOffset
Flange/Bore Center to Center0.000 in. (0mm)
Frame DesignFlexible
Inner WireNo
Inside Diameter0.000 in. (0mm)
Item Height2.500 in. (64mm)
Item Weight1.100 lbs. (0.5 kg)
Machine WashableYes
Number of Flanges1
Oil IncludedFilter Is Pre-Oiled
Outside Diameter5.500 in. (140mm)
Package Content1
Package Contents1 Air Filter
Package MaterialPaperboard
Package Quantity1
Package TypeBox
Product Box Height6.630 in. (168mm)
Product Box Length6.500 in. (165mm)
Product Box Width3.630 in. (92 mm)
Prop 65 (C, R or CR)CR
Prop 65 Warning Labelhttps://www.knfilters.com/images/l/prop65.jpg
TitleK&N RC-0650 Universal Clamp-On Air Filter
Top MaterialChrome
Top StyleMetal
WARNING CA Proposition 65Yes
WARNING CA Proposition 65 MessageWARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov

Round Straight| OD-5.5 in.| Flange L-5/8 in.| Inside Flange2.25 in.| Offset| Chrome End| Filter Length 2.5 in. Replacement Air Filter~w/Weber 34 ICH



  • 1968-1970 Triumph Herald
Customer Questions
Can K&N filters get wet?
No, K&N filters should not get wet.
When to clean K&N air filter?
K&N air filters should be cleaned approximately every 50,000 miles (80,000 kilometers) or as recommended by the manufacturer.
Will K&N filter increase mpg?
It is possible for a K&N air filter to slightly improve fuel efficiency (MPG) under certain conditions.
What does K&N mean?
K&N stands for the names of the two founders of the company, Ken Johnson and Norm McDonald.
Please, mind that only logged in users can submit questions

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