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XS Power 350 Amp Big 3 Wiring Upgrade Kit 1/0 AWG 350A BIG3XS

CASE QUANTITY: N/A

PACKAGE WEIGHT: 4.0 LB

SKU XS-BIG3XS
Sold out
Original price $156.99
Original price $156.99 - Original price $156.99
Original price $156.99
Current price $124.99
$124.99 - $124.99
Current price $124.99

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  • This listing includes:
  • (1) 6-Foot Blue XSFLEX 1/0-Gauge Power Cable (2) 4-Foot Clear XSFLEX 1/0-Gauge Ground Cables
  • (8) XS Power Heat Shrink Tubes (8) 1/0-Gauge Crimp Terminals (Already Crimped on the Wires)
  • (10) Wire Clamps (10) 3" Zip Ties (10) 1/2" Self-Tapping Screws


XS Power 350 Amp Big 3 Wiring Upgrade Kit 1/0 AWG 350A BIG3XS


This listing includes:



  • (1) 6-Foot Blue XSFLEX 1/0-Gauge Power Cable

  • (2) 4-Foot Clear XSFLEX 1/0-Gauge Ground Cables

  • (8) XS Power Heat Shrink Tubes

  • (8) 1/0-Gauge Crimp Terminals (Already Crimped on the Wires)

  • (10) Wire Clamps

  • (10) 3" Zip Ties

  • (10) 1/2" Self-Tapping Screws


XS Power has a reputation of manufacturing the highest quality and highest performance batteries on the market, and now you can get that same quality and performance throughout your entire electrical system with the new XS Power XS Flex and XP Flex power cable. The XS Flex line of power cable is XS Power's flagship power cable. It is available in Blue (XSFLEX0BL-50) and Clear (XSFLEX0CL-50) and in both 50' spools or in 1' increments. The XS Flex Cable is 100% Pure Oxygen Free Tinned Copper Cable with a massive 4,704 strand count. Just like everything else XS Power does the XS Flex Cable exceeds the industry CEA-2015 cabling standards and is True AWG cable. The high strand count and soft touch cable jacket allows the wire to be super flexible and easy to use in any installation.


XS Power's Big3XS kit includes heavy-duty 1/0-gauge oxygen-free copper cables that replace your vehicle's battery ground-to-chassis wire, the chassis-to-engine block wire, and the alternator charge output wire. Another bonus is that the ring terminals are already crimped to the wires, so you won't have to replace the stock grounds unless you want to improve them or double up.


You can view the Instruction manual here: http://www.4xspower.com/BIG3-Kits-Instruction.pdf


Accepted Payment Methods at Big Jeff Audio

At Big Jeff Audio, we strive to make your shopping experience as smooth as possible by offering a wide variety of payment options. Below is a complete list of the payment methods we accept:

Credit and Debit Cards

  • Visa
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  • Diners Club

Digital Wallets

  • Amazon Pay
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International Payment Methods

  • Bancontact
  • iDEAL

Bank Transfers

  • Zelle

Financing Options

We also offer financing options to make purchasing easier. Learn more about our financing options here.

  • Klarna
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If you have any questions or need assistance with payments, feel free to reach out to us at info@bigjeffaudio.com or call us at 737-BIG-JEFF.

Shipping Options and Delivery Time

Do You Offer Expedited Shipping?

Yes! At checkout, you can select from different shipping options:

  • Standard Shipping: Free for orders over $100.
  • Expedited Shipping: Available at an additional cost, calculated based on the weight and destination of your order.

How Long Does Delivery Take?

  • Handling Time: Most orders are processed and shipped within 1 business day after receiving cleared payment. Occasionally, additional handling time may be required, but we’ll notify you if that’s the case.
  • Standard Shipping: Typically takes 3-5 business days, though delivery may be affected by extreme weather or holidays.

What Happens If My Package Is Undeliverable?

If your package is refused or marked undeliverable and returned to us by the carrier, you’ll need to pay the full shipping cost to have the package resent. Alternatively, we can refund your order, minus the cost of shipping.

Why Can’t I Track My Order?

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  • Make sure you’ve received the shipping confirmation email with the tracking number.
  • Log into your account on our website and use the “Check Your Order Status” button.
  • If the issue persists, please refer to our detailed guide on tracking your order or contact our customer service team for further assistance.

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