PRODUCT CATEGORIES

Battery Relocation

Big Three / Big 3 Kits

Car Audio Products

Charging System Upgrade Kits

Custom Cables

Headlight Relay Kits

Individual Components

Master Kits

Tools

Vehicle Grounding Kits

Wiring Books

 

Big 3 Upgrade Kits

Click on any of the pictures to view a high resolution version.

The most popular car audio upgrade in the world - the Big 3! We've been doing this LONG before it even had a name (think 1990 or so), so it only made sense that we'd build and offer the best kit money can buy!

CLICK to read our white paper on the Big 3 Upgrade so you can learn the real benefit and understand exactly why we do it the way we do it.

Our Big 3 Upgrade Kits address the following:

  • Upgrade the charge lead from the alternator output stud to the battery
  • Upgrade the return path between the alternator and vehicle ground
  • Upgrade the return path between the battery negative (-) and the vehicle ground
  • Provide a low resistance return path for high current amplifiers
 

"Outstanding. Parts were incredibly well constructed and you clearly did your homework. My grizzled old mechanic was very impressed and that takes some doing. The car overall now is just running better as well. This wasn't just an audio fix, it was an electrical system fix. Thanks for making such a great product."

Ryan F - Greenfield, WI

Big 3 Upgrade Kit Specifics

As with all of out kits, our Big 3 Upgrade Kits include the very best components available. Rest assured, this is NOT three chunks of welding cable in a zip loc baggie! Each kit is incredibly well thought out and installation is a breeze - no crimping or soldering required!

The Best Cable

We use the very best cable we can get our hands on, all of which meets full American Wire Gauge (AWG) specification, is Pure Oxygen Free Copper (OFC), and tinned for corrosion resistance. Other companies use Copper Clad Aluminum (CCA) cable in an effort to reduce cost. CCA has 30-40% greater resistance per foot than OFC, so while it may be cheaper, it also comes at the expense of performance.

Specifically, our OFC cable has the following strand count:

  • 1/0 AWG Cable - 4,704 strands!

  • 2 AWG Cable - 2,940 strands!

  • 4 AWG Cable - 1,862 strands!

  • 8 AWG Cable - 735 strands!
Pure OFC Copper Cable

The fine strand construction and soft jacket offer excellent flexibility – far superior to standard battery cable and better than the best welding cable!

The Best Parts

We custom assemble all cables in house and building the best cable requires the best parts.  All eyelets used in the construction of our cables are the heaviest duty in the industry.  They have up to twice as much copper weight as standard copper lugs, longer barrels which permit better crimping, and are tin plated to resist corrosion.  These are simply the best quality eyelets we can find and they are ideal for high current applications!

Copper Eyelet vs. Super Thick Tinned Eyelet
Eyelet Comparison 2
Eyelet Installed

Left-standard copper eyelet
Right-super thick tinned eyelet

Left-standard copper eyelet
Right-super thick tinned eyelet

Installed eyelet with super thick
adhesive lined heat shrink

All eyelets are installed via our crimping press and insulated with the thickest adhesive lined heat shrink available.  This super thick adhesive lined heat shrink tubing prevents battery acid or oxidation from entering the connection itself.

Additionally, we include a complete assortment of Grade 5 Hardware with each kit. You'll have every single thing you need to get the job done right the first time - we guarantee it!

Step By Step Full Color Instructions

Each kit includes complete step by step instructions in full color so that your installation goes smoothly! They're super easy to install and require only common hand tools to install them.

Which Kit Do You Need?

We offer Big 3 Upgrade Kits for Top Post and Side Post Applications in 1/0 AWG and 2 AWG. We offer each in three different lengths.

To determine which length kit you need, measure the distance from the alternator output stud to the battery positive terminal taking into account a nice smooth run for the cable. For example, if you measure 3 feet 4 inches, you will need a 4 foot kit.

TOP POST KITS

Our 3 foot Top Post Big 3 Upgrade Kit includes:

  • (1) 3 foot long RED Upgraded Charge Lead*
  • (1) 3 foot long CLEAR Alternator Ground Lead*
  • (1) 2.5 foot long CLEAR Battery Ground Upgrade Lead*
  • (1) 2 foot 8 AWG Accessory Ground Upgrade Lead
  • (1) Pair Lead Free Military Style Battery Clamps
  • (1) Pair Rockford Fosgate platinum plated ring terminals (to connect the stock battery cables to the new clamps without special tools)
  • Ring Boot – to insulate the charge lead connection at the alternator

* Either 1/0 AWG or 2 AWG depending on the kit you choose

General Hardware

Each kit includes a complete assortment of Grade 5 hardware and cable ties required to complete the installation, including zinc plated internal/external star washers for all ground connections. Also Included is a complete assortment of hardware that permits easy connection to any alternator, as we include both SAE and metric bolts. You absolutely, positively will not have to run to the hardware store to install this kit!

The 4 foot kit includes an additional foot of length for each of the two underlined cables listed above.  The 5 foot kit includes an additional two feet of length for each of these cables.

Big 3 Upgrade Kit / Big Three Upgrade Kit for Top Post Batteries
 
Big 3 Upgrade Kit / Big Three Upgrade Kit for Top Post Batteries - Close Up
Note: the top red 1/0 AWG power cable pictured is the amp power wire and is shown for illustrative purposes only.

PRICING

Top Post 1/0 AWG Big 3 Upgrade Kits - For Alternators Making up to 300 Amps of Output:

0BIG3TPB-3 3 foot 1/0 AWG Big 3 Upgrade Kit for Top Post Batteries
$115.95
   
 
0BIG3TPB-4 4 foot 1/0 AWG Big 3 Upgrade Kit for Top Post Batteries
$127.50
   
 
0BIG3TPB-5 5 foot 1/0 AWG Big 3 Upgrade Kit for Top Post Batteries
$139.95
   
     
Top Post 2 AWG Big 3 Upgrade Kits - For Alternators Making up to 225 Amps of Output

2BIG3TPB-3 3 foot 2 AWG Big 3 Upgrade Kit for Top Post Batteries
$99.95
   
 
2BIG3TPB-4 4 foot 2 AWG Big 3 Upgrade Kit for Top Post Batteries
$108.95
   
 
2BIG3TPB-5 5 foot 2 AWG Big 3 Upgrade Kit for Top Post Batteries
$117.95
   

SIDE POST KITS

Our 3 foot Side Post Big 3 Upgrade Kit includes:

  • (1) 3 foot long RED Upgraded Charge Lead*
  • (1) 3 foot long CLEAR Alternator Ground Lead*
  • (1) 2.5 foot long CLEAR Battery Ground Upgrade Lead*
  • (1) 2 foot 8 AWG Accessory Ground Upgrade Lead
  • (1) Pair Platinum Plated Side Post Adapters
  • Ring Boot – to insulate the charge lead connection at the alternator

* Either 1/0 AWG or 2 AWG depending on the kit you choose

General Hardware

Each kit includes a complete assortment of Grade 5 hardware and cable ties required to complete the installation, including zinc plated internal/external star washers for all ground connections. Also Included is a complete assortment of hardware that permits easy connection to any alternator, as we include both SAE and metric bolts. You absolutely, positively will not have to run to the hardware store to install this kit!

The 4 foot kit includes an additional foot of length for each of the two underlined cables listed above.  The 5 foot kit includes an additional two feet of length for each of these cables.

 

Big 3 Upgrade Kit / Big Three Upgrade Kit for Side Post Batteries
 
Big 3 Upgrade Kit / Big Three Upgrade Kit for Side Post Batteries - Close Up
Note: the light red 1/0 AWG power cable pictured is the amp power wire and is shown for illustrative purposes only.

PRICING

Side Post 1/0 AWG Big 3 Upgrade Kits - For Alternators Making up to 300 Amps of Output:

0BIG3SPB-3 3 foot 1/0 AWG Big 3 Upgrade Kit for Side Post Batteries
$100.95
   
 
0BIG3SPB-4 4 foot 1/0 AWG Big 3 Upgrade Kit for Side Post Batteries
$112.50
   
 
0BIG3SPB-5 5 foot 1/0 AWG Big 3 Upgrade Kit for Side Post Batteries
$124.95
   
 
     
Side Post 2 AWG Big 3 Upgrade Kits - For Alternators Making up to 225 Amps of Output:

2BIG3SPB-3 3 foot 2 AWG Big 3 Upgrade Kit for Side Post Batteries
$84.95
   
 
2BIG3SPB-4 4 foot 2 AWG Big 3 Upgrade Kit for Side Post Batteries
$93.95
   
 
2BIG3SPB-5 5 foot 2 AWG Big 3 Upgrade Kit for Side Post Batteries
$102.95
   
 


FUSE THE CHARGE LEAD OPTION
(for both top post or side post kits!)

Most OEM charge leads have a fusible link on them. Its purpose is to protect on-board electronics in the event that the regulator fails and causes "voltage run-away." Although this is quite uncommon, fusing the charge lead included in any of our kits provides the same protection for your larger than stock alternator.

When choosing this option, we'll include a Rockford Fosgate ANL Fuse Holder, a 100A / 125A / 150A / 200A / 250A / 300A fuse (your choice), and mounting hardware. In addition, we increase the length of the charge lead by 1 foot to allow you to choose a good mounting location for the fuse holder and still have a nice smooth run from the alternator to the battery.

PRICING
$50.00
             
FTCL100 with 100A Fuse
  FTCL200 with 200A Fuse
 
             
FTCL125 with 125A Fuse
  FTCL250 with 250A Fuse
 
             
FTCL150 with 150A Fuse
 
  FTCL300 with 300A Fuse
 

RECOMMENDED ACCESSORIES

Add-A-Battery Kit
REAL Amp Kits
Turn-On Relay Kits
Easily add an Auxiliary Battery!
Design the Perfect Amp Kit!
Safely Turn-On Multiple Amps!