Restore lost power and unlock better electrical performance with the ToyotaCables Big 7 Battery Cable Upgrade Kit. Designed to replace worn, undersized factory battery cables, this kit improves current flow for faster starts, stronger charging, and cleaner, more reliable power delivery. While most upgrades stop at the “Big 3,” the Big 7 goes further—addressing additional high-load circuits to create a true better-than-factory electrical foundation for stock vehicles and future builds alike.
Important Note
System Upgrade: Expands beyond the traditional Big 3 by upgrading up to seven critical power and ground paths
Performance Benefit: Reduces voltage drop to improve starting response, charging efficiency, and electrical stability
Material Quality: Built using SAE-approved fine-strand pure copper cable—no CCA
Future Ready: Supports stock systems today and high-draw accessories or upgraded alternators later
Installation Ease: Pre-terminated, pre-labeled cables with military-style battery connections
What’s Included
Alternator Lead: Alternator output to battery positive
Battery Ground: Battery negative to frame/body
Engine Ground: Engine block to frame/body
Starter Lead: Battery positive to starter
Fuse Box Lead: Battery positive to fuse/relay box
External Fuse: ANL fuse added to safely manage increased current
Fuse Holder: Dedicated holder prevents routing high current through factory wiring
Specifications
Cable Material: SAE-approved fine-strand pure copper
Terminal Ends: Solid copper lugs crimped with electromechanical precision
