Toyota Tundra Full Heavy Duty Battery Wiring Upgrade Kit - Big 3 Upgrade Cables

For Sale is the Big 3 Upgrade Grounding/Alt Wiring Upgrade for the 2UV-FE Engines. This will fit 1st Gen Tundras from 2000-2006. This is a great upgrade for any vehicle that is going up in age as the Alternator cables, Ground cables may be corroded and this decreases their performance and reducing your vehicle's maximum electrical performance.

This upgrade will help with improved all electrical wiring necessary for all your vehicle's electrical systems, from Starters, Alternator, to all electrical components needed to run the car properly. This upgrades is highly recommended when you move up from stock Alternator (80-100 Amp) to a higher Amperage Alternator (130-300 Amp). Additionally, this upgrade is vital when installing high amperage power draw equipment such as higher end car audio, audio amplifier, boom boxes, trail lights/LED's, recovery winches, 12/24v fridge and when adding 2nd battery 24v system.

Benefits of the Big 3 Upgrade:

• Improved Charging Performance – Helps your alternator charge the battery more effectively, especially at idle or low RPMs.
• Better Audio Performance – Essential for high-power car audio systems, minimizing dimming lights and improving amplifier performance.
• Stronger Electrical Reliability – Supports added accessories like LED lights, winches, or upgraded cooling fans.
• Simple Yet Effective – A relatively low-cost upgrade with long-lasting benefits for overall electrical health.
• Increased System Efficiency – Enhances overall current flow, especially under heavy electrical load conditions.
• Perfect for daily drivers, off-roaders, and car audio enthusiasts alike!

Improper engine grounding can cause several failures that may appear to be mechanical issues, ranging from the engine not turning over, starter clicking, alternator/battery not charging properly, electric components acting up, or transmission not shifting properly.

These wires are specifically sized and designed to fit the 1st Gen Tundra.

- This kit works for all stock OEM Toyota/Lexus battery terminals
- Please specify if you have a plastic intake as this will need slightly different cable lengths.
- If you have different battery terminals this should work as well but you may need a different fuse and terminals

Please choose option 1 or 2
Pricing -
$185 shipped for 1/0 Gauge - All 4 wires being 1/0 Gauge <--- THIS KIT WORKS WITH HIGH OUTPUT ALTERNATORS (250A+).
$165 shipped for 2 Gauge (2 Gauge Grounding Cables (x3) and 1 Alternator Cable is still 1/0 gauge)
** Please specify if you have a plastic intake - $200 for 1/0 & $175 for 2 gauge.

Payment - I take Zelle or PayPal (please add 3.5% for Paypal fees as they take their cut) or Samsung Wallet Debit "Online Transfer"
BTW sorry material costs are going up due to Tariffs.

Installation instructions Link - Click Here

More PICTURES Can be seen here


**** Please Specify if you want the "BLACK PET COVER" version ****
Here's the link to the how the BLACK PET Cover Big 3 looks - Black PET Big 3 Upgrade

Please ping me if you have any questions.

This kit is designed for one thing -

Increasing your vehicle electrical performance by minimize wire & terminal lug oxidation & corrosion

Specifications -

• Kit includes 100% Copper wires that add and/or replace the following locations given below -
  
  • 1. Battery to Drivers Side Fender Ground Wire (Right side looking at the engine)
  • 2. Fender to Engine Ground Wire (Right side under the Battery, next to the fuel filter)
  • 3. Engine to Firewall Ground Wire
  • 4. Alternator to Battery Positive Wire
  • 5. 150Amp MRBF Fuse to install on Battery Positive Terminal (Slight extra cost for bigger fuses)
• 100% Copper Wire (Flexible and Durable) - Designed to take up to 600 Volts
  • More than 50% bigger than the standard OEM style cables (1/0 Gauge vs OEM), 25% bigger for 2 Gauge
  • Resistant to abrasion, battery acid, diesel, engine coolant, engine oil, ethanol, gasoline, power-steering/transmission fluids,
  • Withstands Extreme temperatures (-50C (-58F) to 105C (221F))
  • 975/30 # conductor strands for 1/0 awg
• High Quality Tinned Plated Copper Terminals Lugs
  • Hydraulic Pressed Terminal Lug Crimp - Crimped twice per Lug
  • Tinned Copper for high corrosive resistance to oxidation/corrosion to the elements
  • Lug are designed to increase surface area contact with terminals studs and to improve metal to metal contact and efficient heat dissipation
• Marine Grade Heat Shrink (Glued Lined for increase water resistance)
• PET Braided Sleeve Cover for added abrasion resistance (***Cable PET Color may change***)
• Made in USA (With US and Imported components)
• Wires specifically and sized to fit the 100 series Land Cruiser/LX470 (1998-2007)
• All cables are clearly labeled and marked for ease of installation (please refer to installation guide)
• This kit is designed to minimize wire & terminal lug oxidation & corrosion increasing your vehicle electrical performance

Pricing is for shipped cost in US only at the movement. For Canada or International please ping me.

Please PM me for ordering and with any questions, suggestions or modifications. I make these on my spare time. I take my time make these cables and ensure these are the best quality cables made for your vehicle. I accept Zelle, PayPal, and Google Pay.

Before you order for customization and to ensure best possible fit for you vehicle I will need the following information

1. Alternator Amps to pick correct fuse amp necessary for your installation
2. Do you have standard Toyota OEM Battery terminal?
3. Is there any other customization that is necessary (this may cost more depending on customization)
4. Plastic Intake or not?
5. Which Color PET Cover would you like?

Thanks

 

I am such a geek for this kinda stuff.... Look super, maybe you can do custom colors?

 

Custom colors like what? Depending on what you want, I can do that. Mostly I don't want to get a color and then no one else wants to get it. Lol