Big 7 Kits Battery Cable Kit 3rd Gen 03-09 Ram 2500/3500 5.9L/6.7L Cummins

Restore and upgrade the electrical performance of your Dodge 5.9L / 6.7L Cummins with the Big 7 Battery Cable Kit. Designed specifically for 3rd Gen Cummins trucks, this complete replacement system eliminates weak, corroded factory wiring and delivers improved starting power, charging efficiency, and overall reliability.

Each kit is constructed from 100% fine-strand oxygen-free copper wire with a durable SAE-rated jacket, ensuring maximum conductivity and long-term durability. Heavy-duty terminals are secured using high-strength, gas-tight crimps and sealed with marine-grade heat shrink to protect against corrosion and harsh conditions.

Whether you're fixing voltage drop issues or upgrading for added electrical demand such as lighting, winches, or performance accessories, this all-in-one Big 7 system provides a noticeable improvement in power delivery and consistency over factory cables. 

AVAILABLE OPTIONS:

• Model Year Configuration:
  • 2003–2005: 5.9L Cummins early 3rd Gen configuration
  • 2006–2009: Late 5.9L and 6.7L Cummins (may require starter connection style selection)
• Wire Gauge:
  • 1/0 Gauge: Ideal for stock or lightly modified trucks
  • 2/0 Gauge: Recommended for high electrical demand, cold climates, or future upgrades

Designed as a direct-fit, vehicle-specific solution, the Big 7 Battery Cable Kit replaces aging factory wiring with a high-performance system built to outlast and outperform OEM components.