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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 18 Reviews
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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
Aron S.
United States United States
Big 4 wire kit 16 sonic rs.

Kit went in well and as described in directions. I kept the oem wires hooked up with the aftermarket ones. works well havent noticed much of engine performance diffrence. but maybe only in the radio and speakers allong with the lights.

Ryan C.
United States United States
No More Light Dimming

After installing sub woofers, I noticed my headlights and interior lights were dimming when the bass hit. After installing this product I no longer experience such problems and I noticed a very mild increase in bass. This is a very good and durable product.

Edward L.
United States United States
4 power wire upgrade kit

Great product, connections are good, wire gauge is excellent size. Install was a bit annoying for a sonic the alternator wire was a bear to replace the upgraded wire, but overall definitely worth the time to buy and install, benefits include more equalized voltage/ohm distribution, better interior/exterior lighting(no more flickering or dimming), better electrical voltage/ohm ouput to the engine and fuel sensors, seems to be better throttle responsiveness and better electrical flow to the fuel injectors as well(did a voltmeter and ohm test) improved the injector performance by 28%