Name: XS Power BIG3XP
Brand: XS Power
SKU: 122BIG3XP
Price: 49.99 USD
Availability: InStock
Rating: 5 (47 reviews)

OVERVIEW

Written by Crutchfield's Jon P.

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 250 amps, this "Big Three" grounding kit will boost your electrical system's performance.

XS Power's Big3XP kit includes heavy-duty 1/0-gauge copper-clad aluminum 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

This Big3XP 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 terminals (already crimped on the wires)
10 wire clamps
10 zip ties
10 screws

Warranty: 1 year

Our 60-day money-back guarantee

Product Highlights:

MFR # BIG3XP

What's in the box:

XS Power BIG3XP owner's manual

One 6-foot XPFLEX 1/0-gauge power cable with ring terminals on both ends (blue)
Two 4-foot XPFLEX 1/0-gauge ground cables (black)
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

REVIEWS

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DETAILS

Researched by Crutchfield's Mark G.

Product Research

Features

Contents: The BIG3XP kit contains the following:

Power Wire: One 6' length of 1/0 gauge multi-strand power wire in a blue jacket (5250 strands/10% oxygen free). 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 black jackets (5250 strands/10% oxygen free). 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 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

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Q&A

Q

Crutchfield asked: Why did you buy this?

To upgrade factory wiring [ Louie Jan 15, 2020 ]

High output alternator [ Onyango Dec 26, 2019 ]

Better Brand [ Remon Apr 30, 2019 ]

I needed wiring for a Big-3 upgrade and wanted to make sure I had quality cables. I trust Crutchfield to only stock quality wires that are safe for their intended purpose. [ Brett Mar 25, 2019 ]

great product [ CHRIS Mar 11, 2019 ]

Just to upgrade the wiring.. helps with headlights that are dimming because of audio system. [ Maximo Feb 04, 2019 ]

Needed to upgrade factory wiring after stereo system install. [ Kevin S. Jan 24, 2019 ]

Bought bigger alternator [ damen Jan 09, 2019 ]

Good product [ Leola Dec 14, 2018 ]

I have a 240 amp high alternator and need something that will be easy to install [ Andrew Nov 28, 2018 ]

Needed to upgrade [ Dalton Nov 16, 2018 ]

Availability and Price. [ Michael Aug 06, 2018 ]

To ensure proper performance of aftermarket vehicle sound system. [ Vernon Aug 02, 2018 ]

I chose this because even before I installed the aftermarket receiver I noticed dimming headlights when rolling windows up. Before I upgrade to subs and amps I want to be certain my electrical system is flowing freely. [ Jacob Jun 09, 2018 ]

Headlights are dimming with new audio install. Time for the big 3 upgrade. [ James Apr 23, 2018 ]

help my cars electrical systems [ Larry Feb 11, 2018 ]

Xs power holds value to its name and my 4.5k system needs upgraded electrical to be ran. This is one piece of the puzzle checked off thanks guys!!! [ Manuel Dec 21, 2017 ]

XS makes great products and the free shipping, cant beat that!!!!!!!! [ kevin Oct 23, 2017 ]

quality company [ M Dec 03, 2015 ]

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11 questions already asked

Do I need to remove factory connections or can I just leave them as is and just add the Big3 cables?

[ Felix Dec 28, 2018 ]

8 answers

I'm no expert, but as far as I know there is no problem with leaving the factory cables. However, you may run out of room on posts or you may not have room for the newer, thicker cables. These new cables are MUCH thicker than your existing, no matter what vehicle you drive.

[ Gary A. Dec 31, 2018 ]

You can leave as is and just add the Big3 cables.

[ James Dec 29, 2018 ]

Keep factory locations, electricity takes the path of least resistance and it's better to leave the factory connections for peace up mind.

[ Jacob Dec 28, 2018 ]

I wouldnt remove any factory cables unless it interferes with installation of the big3 cables.

[ jon Dec 28, 2018 ]

I just add the cable

[ stanley Dec 28, 2018 ]

You can run them without removing the factory ones

[ Joseph Dec 28, 2018 ]

Definitely leave them.

[ KEITH Dec 28, 2018 ]

I just added mine to the existing wiring.

[ Gary Dec 28, 2018 ]

Do I need this one or the more expensive one? I'm running 2 amps, one at 110x4 and another at 600x1.

[ Felix Dec 24, 2018 ]

2 answers

From my personal experience, at a little over 1000 watts the big 3 is not necessary.

[ Ronnie Dec 25, 2018 ]

That is perfect for your setup, your amps will thank you. Go on more step and add a extra battery.

[ Calvin Dec 24, 2018 ]

This kit is 49.99 and you have another 99.99 they read the same output but the more price one is 100%OFC wire and cheap one is 10%OFC?

[ Joseph Aug 21, 2018 ]

2 answers

Yes 100%ofc is pure copper which is corrosion resistant over the 10% it flows electricity alot faster,and cooler it's for high end electrical components and high power flow with very little drop of voltage and amps

[ ryan Aug 29, 2018 ]

Get the $49.99 one. You'd be wasting your money for the $99.99 kit. The only time you'd need the $99.99 one is if you're running a lot more current through your wire. Like if you had a fully loaded system with bells whistles on your car and several amps and capacitors. In which case I'd upgrade my battery to a performance battery as well. Hope this helps Chive On!

[ Carson Aug 29, 2018 ]

The big 3 usually seems to include alternator to battery positive, battery negative to ground, engine block to chassis ground (and that's what the product description describes), but the kit's directions say alternator to battery positive, battery negative to ground, and *alternator ground* to chassis ground rather than engine block to ground. Which would be best? Thanks, guys!

[ James May 22, 2018 ]

2 answers

Engine block to ground is the better option. IMHO

[ David May 22, 2018 ]

I'm not sure that either one is "better". I purchased this same kit and I installed it like this: 1) Alternator to battery positive 2) Battery negative to chassis ground 3) engine block to chassis ground ^^ I've never had issues with this install. I think some alternators can be/some people do ground to the chassis.

[ Erick May 22, 2018 ]

Do I need to put a fuse on the charging cable from my alternator to battery? I have a 230 amp alternator.

[ Sal Apr 01, 2018 ]

7 answers

your stock alternator cable has a fusible link , so yes you need to fuse the new alt to battery cable

[ brian Aug 19, 2019 ]

230 amp alternator is nice to have. I've never personaly seen a fuse from your alternator to battery. But i guess it wouldn't hurt or be a problem unless your battery can't handle 230.

[ BRYAN JAMES Apr 13, 2018 ]

You don't have to but I always do just to be safe. If you alternator goes bad your not going very far anyway...

[ Patrick Apr 09, 2018 ]

[ Mitchell Apr 09, 2018 ]

It's not necessary but will not hurt to do so hopes my answer helps u

[ GEORGE Apr 09, 2018 ]

NO you don't have to put fuse. look for the video on you tube and get better idea. i hope this help you.

[ Carlos Apr 09, 2018 ]

[ Zachary Apr 08, 2018 ]

How would I crimp one end after cutting it to size? And do I need to cover the wires in loom or techflex?

[ James Nov 10, 2017 ]

2 answers

With any crimp tool for the gauge of wire you have. Search for "Hydraulic Wire Battery Cable Crimper". You can find these on amazon for a decent price. You don't "need" to cover the wire, but don't think doing it would be bad.

[ Erick Nov 10, 2017 ]

I bought a 0gauge crimp tool for 40 bucks but these wires have some decent length to it unless you want to shorten it. I just have my wires bare been that way for a while now but tech flex looks a lot better go for it

[ QJUAN Nov 10, 2017 ]

Can you call will your wiring kit work on a 7-3 Powerstroke in a 1999 F250 will your battery cable kit work on a 1999 F250 with the 7-3 with dual batteries?

[ 1bad68 Feb 17, 2017 ]

1 answer

You will want to contact an Advisor by phone (1-800-324-9695) or online chat to discuss compatibility with your vehicle. They will be able to pull up your vehicle and see if this will integrate. If it does not, then they will also be able to discuss other options with you.

[ Kenny Feb 18, 2017 ] Staff

I'm trying to run a secondary battery from my trunk if I have enough gauge cable will this kit work to do the rest?

[ Channing Feb 06, 2017 ]

1 answer

What do you mean do the rest do you already have wires ran to the back to connect the second battery let me know exactly what you are trying to do

[ QJUAN Feb 06, 2017 ]

how to do the big 3 upgrade with a battery under the rear seat?

[ Tim Jun 18, 2016 ]

1 answer

You have to run zero gauge wire from the battery the same way if it was under the hood. Gonna cost a lot more for sure.

[ ALAN Jun 19, 2016 ]

On the answer to this question why do you say "The problem with doing the big three is the increase power flow to your alternator. " what problem are you talking about ,?why would there be a problem,? shouldn't it be a solution ?

[ Dawn Dec 01, 2015 ]

1 answer

I believe Paul's concern there was about too much power going to alternator and causing an issue with it. I don't expect that would be a problem for most alternators.

[ Jeff Dec 01, 2015 ] Staff

OK so I just bought a capacitor and it didn't help my lights that were dimming at all? How much would this benefit and would I have to but a high output alternator? I don't want to spend much money and if the capacitor is a waste I'll take it back for refund. I'm running 2 10 in Alpine type s Subwoofers with a Alpine m-1000 amp.

[ Remington Jan 09, 2014 ]

3 answers

This will allow more power to flow through your car. The wiring your car has now is very thin. The problem with doing the big three is the increase power flow to your alternator. Depending on how many amps your stock alternator is and how many watts rms you are going to be pushing will tell me more how important it is to replace your alternator

[ PAUL Jan 09, 2014 ]

Lose the cap they usually don't help much. It's hard to say how much you'll benefit but you will benefit nonetheless. it depends on your alternator size and current wiring. The big 3 will more than a cap probably would.

[ Eugene Jan 09, 2014 ]

Definitely get your money on the capacitor for the money you spend on a good capacitor you could by a good XS Power battery for under your hood and that would probably fix your light dimming problem. If you can afford to do the big 3 and replace your under the hood battery with the biggest Xs Power battery you can fit it will stop your dimming especially on a 1k amp. Hope this helps. Blessings!

[ Darius Jan 09, 2014 ]

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XS Power BIG3XP

250-amp Big 3 wiring upgrade kit

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About the XS Power BIG3XP

The one-step "Big 3" upgrade kit

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