Chain Drive Extension Kit

for 8' High Garage Doors

Works with 3-Piece, C-Channel Chain Drive Rails

Chain Drive Extension Kit

An extension kit can be added to an existing 7', multi-piece rail design to accommodate an 8' high door. This kit is designed specifically for Genie chain drive garage door openers with a 3-piece, 7' C-Channel rail.


  • Compatible with Models: 3022, 4022, ChainMax® 1000 ChainMax® 1200

  • This kit allows the garage door opener to fully open garage doors up to 8ft. high

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Installation Manuals and Support

Installation Manual


Other Helpful Resources


* More resources and support can be found on our full Genie Customer Support Portal