NeckIt! Products

NeckIt! Is the world’s leading anti-siphon device. Prevent fuel theft with the NeckIt! premium design. Installs in just a few minutes and offers superior protection compared to other devices on the North American market.

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FuelDefend USA Anti Siphon Device - Freightliner Sterling - Ni600010    Ni600010 - Anti-Siphon Device 2.25” Fill Neck
  Peterbilt & Kenworth dealers: Part Number AS1000FR

  Fits:
  Freightliner (heavy models – see 48mm device for medium duty)
  Sterling
  Western Star

  * NOTE: some Freightliner applications require  omitting lower circlip
  to fit in tank neck


  Technical Specification
FuelDefend USA Anti Siphon Device -Mack/International/Kenworth - Ni640001   Ni640001 - Anti-Siphon Device 2.5” Fill Neck
  Peterbilt & Kenworth dealers: Part Number AS1000VL

  Fits:
  Volvo (2003 & Newer)
  Mack (2003-Newer)
  International (Only select models - most Intl take Ni770002)
  Kenworth

  * NOTE:  Kenworth applications require 5/8” long set screws (included in the kits)


  Technical Specification
FuelDefend USA Anti Siphon Device - Peterbilt - Ni770001

  Ni770001 - Anti-Siphon Device 2” Fill Neck
  Peterbilt & Kenworth dealers: Part Number AS1000PB

  Fits:
  Peterbilt


  Technical Specification
FuelDefend USA Anti Siphon Device - Volvo/Mack/International/Western Star - Ni770002    Ni770002 - Anti-Siphon Device 3” Fill Neck
  Peterbilt & Kenworth dealers: Part Number AS1000NA

  Fits:
  Volvo (2002 & older)
  Mack (2002 & older)
  International
  Western Star


  Technical Specification
coming soon   48mm Anti-Siphon Device COMING SOON

  Fits:
  Reefer Tanks
  Freightliner M2
  International 4000
  Dura Star
  Hino with aluminum exterior tank
  Ford SuperDuty with Aluminum exterior tamk