Skip Navigation

XS Power BIG3XS

350-amp Big 3 wiring upgrade kit

3 Reviews | 3 questions - 8 answers

Overview

Our take on the XS Power BIG3XS

 If your aftermarket audio system is putting a strain on the rest of your car's electronics, you might want to upgrade your factory wiring. Rated to 350 amps, this "Big Three" grounding kit will boost your electrical system's performance.

The one-step "Big 3" upgrade kit

 If your aftermarket audio system is putting a strain on the rest of your car's electronics, you might want to upgrade your factory wiring. Rated to 350 amps, this "Big Three" grounding kit will boost your electrical system's performance.

XS Power's Big3XS kit includes heavy-duty 1/0-gauge oxygen-free copper cables that replace (or augment) your vehicle's battery ground-to-chassis wire, the chassis-to-engine block wire, and the wire connecting the alternator's positive output to the battery's positive terminal.

Another bonus is that the 8.5 mm 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. Extra ring connectors are included, so you'll be able to trim the wires to length and replace the terminals if needed.

The Package

The 350-amp Big3XS kit includes: 

  • 1 6-foot XPFLEX 1/0-gauge power cable
  • 2 4-foot XPFLEX 1/0-gauge ground cables
  • 8 XS Power heat shrink tubes
  • 8 1/0-gauge crimp  crimp terminals (already crimped on the wires)
  • 10 wire clamps
  • 10 zip ties
  • 10 screws
Warranty: 1 year

Positive cable was the perfect length to reach alternator to battery. Negative cse was good length to ground battery to chassis. But the other negative cable could have easily been only a foot long to go from battery to chassis. This is for my 2013 mustang.

Jon, Texas

What's in the Box:

  • One 6-foot XSFLEX 1/0-gauge power cable with ring terminals on both ends (blue)
  • Two 4-foot XSFLEX 1/0-gauge ground cables (pearl)
  • Two extra 1/0-gauge crimp-on ring terminals
  • 2 Heat shrink terminal protection tubes
  • 10 wire clamps
  • Ten 3" Zip-ties
  • Ten 1/2" Self-tapping screws
  • Instructions on the box

Product Highlights:

    Reviews

    XS Power BIG3XS Reviews

    Average Customer Review(s):

    (3 Reviews)
    rewards card

    Submit a review and enter to win a $350 rewards card

    Review this product

    Thanks for submitting your review

    Most reviews are processed and published within 5 business days. You will receive a confirmation email once your review has been published.

    Your Review

    Use the stars below to rate the overall product on a scale of 1-5
    1500
    Upload your photos

    Not visible. Email associated with order.
    (e.g., Charlottesville, VA)

    Additional Fields (optional)

    500
    500

    By submitting this review, you agree to our terms and review guidelines.

    Filter by rating

    Customer photos


    << >>
    Details

    Hands-on research

    Product Research

    Features

    Contents: The BIG3XS kit contains the following:

    • Power Wire: One 6' length of 1/0 gauge multi-strand power wire in a blue jacket (4704 strands/100% oxygen free copper ). Both ends have ring terminals attached; 0.715" wide and 0.330" inner diameter.
    • Ground Wires: Two 4' lengths of 1/0 gauge multi-strand ground wires in translucent pearl colored jackets (4704 strands/100% oxygen free copper). Both ends of each wire have ring terminals attached; 0.715" wide and 0.330" inner diameter.
    • Installation Accessories:
      • Two additional 1/0 AWG crimp-on ring terminals
      • Two XS Power heat shrink tubes (used with the extra ring terminals to protect exposed surface)
      • Ten wire clamps
      • Ten 1/2" Self-tapping screws
      • Ten 3" Wire ties

    Our Product Research Team

    At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

    Q & A

    Customer Q&A

    Crutchfield asked  
    Why did you buy this?

    The cables are recommended by the manufacturer of my subs because they are 100% OFC (oxygen free copper) , I replaced my alternator with a high output amp (300+ amps) and was advised by the company to do a "big 3 upgrade" , this brand is used consistently by my sub manufacturer when they build systems for cars [ ZACKERY  Feb 17, 2016 ]

    3 questions already asked

    No it will not, the main power wire is only 6 foot long, my suburban needed 13 ft I think to make it to the back [ Andrew  Nov 04, 2016 ]
    Leave the original cables connected. [ Eric  Oct 23, 2015 ]
    Leave the current wires and use the XS wires as extra. You'll have more current with the more wire you have. Think of it as a bridge, the bigger the bridge the more traffic that can flow threw same thing applies with the wires. The more and/or bigger the wires the more electricity can flow threw it. [ James  Oct 21, 2015 ]
    The instructions state that either way is OK. But if in doubt as to what else may be wired up, add these in addition, and leave the original wiring connected. [ JONATHAN  Oct 20, 2015 ]
    I added to the existing wires. [ RICK  Oct 20, 2015 ]
    How To Install Big Three Upgrade... look for big 3 upgrade on you tube [ Eric  Oct 23, 2015 ]
    It's fine to hook as described the only difference it that I would fuse the power from the alternator to the battery with the according fuse for your system. [ Rob Bass  Jul 30, 2015 ]
    I'm not sure I took mine to a shop and got it done. Sorry I can't help you. [ Rob  May 29, 2014 ]

    Searches related to the XS Power BIG3XS 350-amp Big 3 wiring upgrade kit