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:
|
"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:
|
![]() |
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!
Left-standard copper eyelet |
Left-standard copper 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:
* 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. |
|
| 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:
* 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.
|
|
| 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
Easily add an Auxiliary Battery! |
Design the Perfect Amp Kit! |
Safely Turn-On Multiple Amps! |











