FAQs

We accept all major credit cards, Shop Pay, Apple Pay and PayPal payments.

The merchandise must be new, in package and not installed in order to return. There’s is a 10% restocking fee on returned merchandise. Instructions can be found here.

Yes! Email us at info@big7kits.com or give us a call 971-206-4686 and we'll be happy to update or cancel your order.

Here’s the rule of thumb on fuses and alternators. You want to use the closest amperage fuse (that is higher than alternator output) within a 10% range. The 10% margin is a safety range incase of alternator current over rush.

We usually recommend the 2ga set to most customers. Click this link on how to select the right size wire for your project.

How to Choose the Right Wire Size for Your Vehicle

One of the most common questions we receive is: “What size wire do I need for my vehicle?” The answer depends largely on your vehicle’s electrical demands and your future upgrade plans.

For most customers, we recommend a 2-gauge (2ga) wire set. It’s a solid upgrade from the factory-standard 4-gauge wire and is well-suited for vehicles equipped with higher-output alternators (up to 180 amps), auxiliary lighting, or a winch. This size strikes a good balance between performance and cost for typical aftermarket enhancements.

If you're simply replacing stock wiring to resolve electrical issues and don’t plan on adding accessories or upgrading your alternator, a 4-gauge (4ga) wire set is usually sufficient. It supports alternators with outputs up to approximately 136 amps and is ideal for restoring factory performance.

For more demanding electrical systems—such as those with under-hood welders, high-powered audio systems, or high-output alternators like the JS Alternators we carry—we recommend stepping up to 1/0-gauge (1/0ga) wire. This size ensures safe and efficient power delivery under heavy loads. While it may be more than necessary for some setups, it provides headroom for future upgrades.

As for 2/0-gauge (2/0ga) wire, it’s typically overkill unless you're running a diesel truck or building a show vehicle. That said, we understand the appeal—sometimes, it’s about performance and presentation.

Still unsure which wire size is right for your build? Don’t hesitate to reach out. Give us a call or send us an email with your specific setup, and our team will be happy to guide you.

Yes we do! We stand behind the quality of our cables, if something breaks contact us for a replacement.

Yes we do! Just put in your address to see shipping costs to your country. Please note international order may take additional time to arrive.

Most orders ship in 1-3 business days. Once we package up your order you'll receive a tracking number to sent to the email used to place your order.