⚡ Sky High Car Audio 4 Gauge OFC Big 3 Upgrade Kit

Upgrade your electrical system with a 4 gauge OFC Big 3 kit designed for reliable power delivery and clean, professional installs.

Standard 4ft Power & Ground Wiring Kit

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.

🔧 What’s Included

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

📏 Standard 4ft Kit

Each cable includes:
✔ One end pre-crimped
✔ One open end for routing and trimming

Allows for:

🔌 Why OFC Wire Matters

✔ Higher conductivity than CCA
✔ Lower resistance
✔ Improved voltage stability
✔ Better performance under load

Ideal for:

⚙️ What is the Big 3 Upgrade?

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

🎨 Color Options

Choose from:

-RED

-BLUE

-GREEN

-ORANGE

-PURPLE

-SILVER/GRAY

-AQUA

-WHITE

(All kits include black ground wires. Select Power Cable Color before checkout)

🔥 Installation Ready Design

• Pre-crimped terminals for convenience
• Additional terminals included for custom fit
• Heat shrink included for clean finish

⚠️ Important Notes

• 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

Sky High Car Audio products are trusted by installers and enthusiasts for high-quality materials, reliability, and clean installation solutions.