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home > VTG OEM Harley Davidson Flathead Steel Valve Intake NOS WL Servi-Car 18070-32 > VTG OEM Harley Davidson Flathead Steel Valve Intake NOS WL Servi-Car 18070-32
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VTG OEM Harley Davidson Flathead Steel Valve Intake NOS WL Servi-Car 18070-32VTG OEM Harley Davidson Flathead Steel Valve Intake NOS WL Servi Car 18070 32 Part #: 18070 32 Harley Davidson part number 18070 32 is a Steel Intake Valve. Head Diameter: 1. 625" (41. 28 mm) Stem Diameter: 0. 3395" (8. 6 mm) Overall Length: 5. 585" Seat Angle: 45 degrees Plain Steel: Standard OEM style finish Black Nitride: A modern upgrade often used to improve heat resistance and durability with unleaded fuels Fitment: The exact fitment for Harley
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VTG OEM Harley Davidson Flathead Steel Valve Intake NOS WL Servi-Car 18070-32

Part #: 18070-32

Harley-Davidson part number 18070-32 is a Steel Intake Valve.

  • Head Diameter: 1.625" (41.28 mm)
  • Stem Diameter: 0.3395" (8.6 mm)
  • Overall Length: 5.585"
  • Seat Angle: 45 degrees
  • Plain Steel: Standard OEM-style finish
  • Black Nitride: A modern upgrade often used to improve heat resistance and durability with unleaded fuels

Fitment: The exact fitment for Harley-Davidson part number 18070-32 covers almost all 45 cubic inch (750cc) Side-Valve "Flathead" engines manufactured between 1932 and 1973.

  • Servi-Car (G series): All 45" three-wheeler models including G, GA, GD, GDT, and GE from 1932 to 1973.
  • WL Series (Solo): Includes WL, WLD, and high-compression WLDR models from 1937 to 1952.
  • Military Models: Specifically the WLA (U.S. Army) and WLC (Canadian Military) produced primarily between 1940 and 1945.
  • Early R Series: Some catalogs indicate crossover fitment for late R, RL, and RS 45" models starting in 1932.

Fitment Exceptions and Variations

  • Early 45" Models (1929–1931): These early models typically used a different valve with a smaller 1-1/8" head diameter and are not compatible with the 18070-32 unless the seats have been modified.
  • Intake vs. Exhaust: While officially designated as an intake valve, many high-quality aftermarket replacements (such as those from V-Twin Manufacturing) are manufactured from materials that allow them to be used as interchangeable intake and exhaust valves.
  • Oversize Seats: If your engine has undergone multiple rebuilds, you may need the 1/8" oversize version of this valve to properly seal worn seats.

Please make sure of fitment before buying.

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VTG OEM Harley Davidson Flathead Steel Valve Intake NOS WL Servi-Car 18070-32

Item no : 17847517185
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US$ 49.99
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