Upgrade your vehicle’s electrical system with the Sky High Car Audio 4 gauge OFC Big 3 Upgrade Kit, designed to improve current flow, reduce voltage drop, and support car audio and electrical upgrades.
Built using 100% Oxygen Free Copper (OFC) for maximum conductivity and performance.
• 1 × Power Wire (4ft – selected color)
• 2 × Ground Wires (4ft each – black)
• 3 × Pre-Installed Ring Terminals (one per cable)
• 3 × Additional Ring Terminals
• Heat Shrink Tubing for installation
Each cable includes:
✔ One end pre-crimped
✔ One open end for routing and trimming
Allows for:
✔ Higher conductivity than CCA
✔ Lower resistance
✔ Improved voltage stability
✔ Better performance under load
Ideal for:
The Big 3 upgrade improves:
• Alternator to Battery Positive
• Battery Negative to Chassis
• Engine Block to Chassis
**See pictures for wiring diagram**
Helps:
✔ reduce voltage drop
✔ improve charging efficiency
✔ support higher current demand
Choose from:
-RED
-BLUE
-GREEN
-ORANGE
-PURPLE
-SILVER/GRAY
-AQUA
-WHITE
(All kits include black ground wires. Select Power Cable Color before checkout)
• Pre-crimped terminals for convenience
• Additional terminals included for custom fit
• Heat shrink included for clean finish
• This is a standard 4ft kit
• For extended power wire lengths, see our custom Big 3 listings
• Ensure proper installation for best performance
Sky High Car Audio products are trusted by installers and enthusiasts for high-quality materials, reliability, and clean installation solutions.