Big 3 Power Upgrade Kits for Car Audio

Boost voltage flow and eliminate power loss in your custom car audio setup with a Big 3 Power Upgrade Kit. Designed to handle high current demands from aftermarket amplifiers, subwoofers, and alternators, these kits upgrade three key connections:

• Alternator to Battery

• Battery to Chassis Ground

• Engine Block to Chassis Ground

Choose from oxygen-free copper (OFC) or copper-clad aluminum (CCA) wiring with multiple gauge options to match your system's power needs. Whether you’re daily driving or competing in SPL builds, our Big 3 kits reduce voltage drop, improve grounding, and protect your gear from electrical strain.

✔ Available in 1/0 AWG, 4 AWG, and custom lengths
✔ Heat-resistant insulation for under-hood use
✔ Pre-terminated with high-quality ring terminals
✔ Compatible with high-output alternators and batteries

Don’t let weak wiring hold you back—upgrade your power delivery and unleash the full potential of your car audio system.