Restore dependable electrical performance in your Chevrolet or GMC 6.6L Duramax with the Big 7 Battery Cable Kit. Designed specifically for LB7, LLY, and LBZ-powered trucks, this complete replacement system eliminates aging, corroded factory wiring to help reduce voltage drop, improve cold starts, and deliver more consistent current to the starter, alternator, batteries, and electrical accessories.
Each kit is constructed from 100% fine-strand, SAE-rated pure copper cable with a flexible J1127 jacket for excellent conductivity and long-term durability. Solid-copper terminals are secured using gas-tight electromechanical crimps rated for up to 700 pounds of pull force, then sealed with marine-grade heat shrink to help protect the connections against moisture and corrosion.
This vehicle-specific Big 7 system includes replacement cables, corrosion-resistant military-style battery terminals, a MEGA fuse and fuse holder, and protective heat shielding or wrapping where required. Every cable end is clearly labeled to simplify installation and help ensure each connection is routed correctly.
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Cable Size: Choose 1/0-gauge or heavier 2/0-gauge pure copper cables
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Cable Finish: Available with Black / Ped, or Spyder-pattern protective sleeving
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High-Output Alternator Option: Adds larger cables for trucks equipped with a high-output alternator