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Big 4 Power Wire Kit

This kit is made to upgrade your factory positive and negative wires to increase your cars electrical system. By increasing the size of the wire, it will raise the alternators output voltage which will improve everythings performance that uses the 12 volt system. For example, ignition, steering, stereo, headlights, etc. When we installed this on our shop Sonic it bumped the voltage .3, other people have reported more. We are not tricking the alternator to put out more voltage, we are just allowing the full voltage from the voltage regulator to make it to the fuse panel and battery. Whatever output voltage you have must have a better ground as well, so we include 2 upgraded ground wires as well.

The Cruze comes with 1 less wire than the Sonic.

CLICK HERE for Digital Install Instructions - Cruze

CLICK HERE for Digital Install Instructions - Sonic

Customer Reviews
4.7 Based on 21 Reviews
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United States United States
Does not directly fit a smaller battery

My Cruze has the premium sound system and I noticed that if I blast it on my way home the alternator couldn’t keep up. I installed this kit and now my alternator is charging at 14.7-15v. The only issue I ran into is that I have a slightly smaller battery than stock and I could not run the ground through the current sensor in the stock location. I moved the sensor and still barely had enough length. There is not much slack in the other cables as well.

Ceasar H.
United States United States
Sonic owners...

I installed this in my 2012 LTZ SEDAN, 6MT 1.4T... I used the stock pos wire to connect from my alternator to starter, and installed the other wires according to instructions... Feel the difference and stereo is louder!

Kenneth F.
United States United States
Big 4 Power wire kit

Highly satisfied with the product and will definitely recommend to others.

Scott A.
United States United States

Definitely made my stero louder, lights brighter and car starts alot faster

Shaun C.
Australia Australia
Big 4 Now Big 5

Overall quality was good, all wires fit as described. Only thing is, being an international make (Holden Barina RS) wiring was different to alternator so I had to fabricate an extra wire from alternator to starter motor. After install have notice more steady power through entire rpm range. Idle is smoother. And sub bass hits better.

ZZPerformance Big 4 Power Wire Kit Review