The Big7Kits Big 7 Battery Cable Kit is a complete electrical system upgrade designed to replace worn, undersized factory battery cables on 5th-gen 4Runners. Heat, corrosion, and age reduce current flow over time—this kit restores and improves electrical performance for stronger starts, better charging, and a more reliable vehicle overall.
This isn’t just a basic “Big 3” upgrade. It’s a true Big 7, engineered to go beyond factory limitations and future-proof your 4Runner for added accessories and higher electrical demand.
Important Note
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Big 7 upgrade: Improves current capacity for alternator output, battery grounds, starter, and fuse relay circuits.
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Beyond Big 3: Includes additional starter and fuse relay leads plus an external fuse to avoid routing higher current through factory fuse wiring.
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Pure copper: Uses SAE-approved fine-strand pure copper cable, not copper-clad aluminum (CCA).
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Crimp quality: Solid copper lugs are crimped using an electromechanical crimping machine for maximum conductivity.
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Environmental seal: Marine-grade heat shrink meets MIL-I-23053/4 standards for corrosion resistance.
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Battery terminals: Includes military-style corrosion-resistant battery connections.
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Fuse protection: Includes ANL fuse and fuse holder for safe high-current routing.
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Ease of install: All cable ends are clearly labeled for straightforward installation.
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Alternator: Does not require a larger alternator—fully compatible with stock charging systems.
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Reliability: Helps eliminate voltage drop and electrical gremlins caused by factory cable degradation.
Why Upgrade to Big 7
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Starting power: Delivers faster, stronger, more consistent starts.
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Charging efficiency: Improves battery charging stability and alternator performance.
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Electrical reliability: Reduces common electrical issues on modern accessory-heavy builds.
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Future-ready: Prepares your 4Runner for winches, lights, inverters, audio upgrades, and overland gear.
Cable Size Options
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2 GA: Ideal for stock vehicles or mild electrical upgrades.
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1/0 GA: Recommended for future modifications and long-term electrical headroom.
Specifications
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Cable material: SAE-approved fine-strand pure copper
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Insulation: Marine-grade heat shrink (MIL-I-23053/4)
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Terminals: Solid copper lugs with military-style battery connections
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Fuse type: ANL fuse with holder
Package Contents
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Cables: Big 7 upgraded battery cable set
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Terminals: Military-style battery connections
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Protection: ANL fuse and fuse holder
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Labeling: Pre-labeled cable ends for easy installation
Vehicle / Fitment
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Fits: Toyota 4Runner
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Years: 2010–2024
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Application: Factory battery cable replacement and electrical system upgrade
