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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 26 Reviews
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Steve N.
United States United States
Big power wire kit

The kit was easy to install and was a great idea. The only issue was the engine ground could be longer so it could be tucked away better. Thanks guys, nice product

Michael T.
United States United States
Good product

Had engine out of chassis rebuilding my engine when I installed the big 4 kit and was a piece of cake took five min to install. Thanks guys

Patrick B.
United States United States
No more dimming.

This kit works perfectly. The directions have some typos in important places but as long as you know what you're looking at you should be fine as it's pretty straight forward. After install, my headlights don't dim when the compressor kicks on and and nothing ever bogs down, it stays running like it should.

Andrew W.
United States United States
Cruze big 3

Overall it works. Bumped my voltage up .7! One thing they need is to include heat shield tape for the ground connecting to engine block. Because my is melting it's getting so hot there plus it is BARELY long enough maybe a couple more inches would help.

United States United States
Easy install!

I installed this kit about a week ago and I’m happy with the results. Lights are a bit brighter, sound system sounds more crisp, and Iv noticed it cranks a bit faster when you go to start the car. This also is a must buy if your putting aftermarket speakers in your car. All in all I’m happy with the results, and you can’t beat the price! #GoFastNotBroke