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Our dual battery wiring system features 2/0 awg marine grade battery cable for the batteries, and battery to starter, and 6awg cable for the alternator charging. This allows for quicker starting, and use of a higher amperage alternator if desired.

Fitment notes:

Fits all 1994-2004 H1 Hummers with 6.5 or 6.5TD engines (dual battery setup in the tray on the passenger side engine bay).

Battery Wiring Kit (Hummer H1 Fitment)

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