Ignitions and Electrical Charging Systems

Universal

Big 3 Alternator Wiring Upgrade Kit

$120.00

SKU: UB3W-alt

In Stock
In Stock
Ships by Aug 3
Free Shipping over $100
30 Days Return
INSTALL DIFFICULTY
DIY PRO SHOP

Moderate — 2–4 hours

Description

The Universal Big 3 Alternator Wiring Upgrade Kit is engineered to enhance the electrical system of vehicles requiring robust power delivery, especially those with high amp and high output alternators. This kit is constructed with true 1/0 pure copper cable, ensuring maximum conductivity and durability. It provides ample length with 4 feet of positive cable, 4 feet of ground cable, and an additional 3 feet of ground cable, all featuring professionally crimped copper lugs and heat shrink for a secure and reliable connection. This means some customization or adjustment may be necessary during installation to ensure a perfect fit for your particular application. The kit is a crucial upgrade for any system pushing the limits of its electrical capacity. This Big3 wiring kit is specifically required for all high amp and high output alternators, ensuring they receive the stable power necessary to function optimally and prevent system strain.

MIA's Description

The Universal Big 3 Alternator Wiring Upgrade Kit is a true 1/0 pure copper wiring kit designed for high amp and high output alternators. This kit includes 4 feet of positive cable, 4 feet of ground cable, and 3 feet of ground cable, all with copper lugs that are crimped and heat-shrunk.

Fitment

Fitment Guaranteed

Don’t gamble
on fit.

Log your build in the MOTORMIA app and we’ll guarantee this part fits your exact setup — or your money back, return shipping covered.

Available on iOS & Android

Specifications

BrandUniversal
Part NumberUB3W-alt
CategoryIgnitions and Electrical

Buy with Confidence

Built for enthusiasts. Every order is backed by our 30 day return window on eligible items. Unused and uninstalled products may be returned with approved RMA and no restocking fees when received in new condition. Orders placed through the MOTORMIA app with a complete build qualify for our Fitment Guarantee — free return shipping if the part doesn’t fit your exact setup. The guarantee covers fit only; installation must follow manufacturer instructions, and we recommend a qualified shop for parts marked Difficulty 4–5.

View Full Return Policy