2/0 AWG Big 3 Upgrade Kit GP Merica NO BS OFHC CABLE

Unlock the full potential of your vehicle’s electrical system with the GP Car Audio NO BS 2/0 AWG Big 3 Upgrade Kit — a true‑spec, pure‑copper solution engineered for maximum current flow, improved voltage stability, and stronger overall system performance. Built for enthusiasts who demand real results, real copper, and zero gimmicks.

TRUE 2/0 AWG OFHC Copper Big 3 Upgrade Kit

This kit uses 99.99% OFHC (Oxygen‑Free High Conductivity) pure copper cable, delivering exceptional conductivity, ultra‑low resistance, and excellent flexibility. No CCA, no shortcuts — just real copper designed to handle extreme electrical loads.

Performance Ratings

• Rated at 400 amps @ 25 feet

• SAE J378C / SAE J1127 Certified

These official automotive‑grade standards define:

• Copper purity and conductor quality

• Required strand count and flexibility

• Insulation durability in real automotive environments

• Resistance to heat, abrasion, chemicals, and vibration

SAE certification means this wire meets the same specifications required for OEM‑level power and battery cable — engineered to survive under‑hood heat, vibration, and long‑term use.

Temperature Range: –75°C (–103°F) to +105°C (221°F)

• Flexible in extreme cold

• Stable and safe in high‑heat environments

• Rugged, long‑lasting insulation

What the Big 3 Upgrade Improves

• Charging system efficiency

• Voltage stability under load

• Amplifier performance and output

• Reduction of headlight dimming

• Overall electrical reliability

Standard Kit Includes (4 ft Each)

• 4 ft — 2/0 OFHC alternator‑to‑battery power cable (crimped on one end)

• 4 ft — 2/0 OFHC engine‑to‑chassis ground (crimped on one end)

• 4 ft — 2/0 OFHC battery‑to‑chassis ground (crimped on one end)

• 3× extra high‑quality lugs + heat shrink for the remaining ends

• All cables cut to proper lengths for clean, efficient installation

Additional Options Available

• Trunk Starting Battery Big 3 Kit (extended‑length configuration)

• Custom length options depending on your build needs

Key Features

• True AWG copper cable (full‑spec 2/0 conductor size)

• Ultra‑flexible jacket for easy routing in tight engine bays

• High strand count for maximum conductivity and bend radius

• OFHC pure copper — no CCA, no mixed metals

• Made in the U.S.A.

Whether you’re running high‑output amplifiers, upgraded alternators, or simply want a stronger and more reliable electrical foundation, the GP NO BS 2/0 Big 3 Upgrade Kit delivers exactly what the name promises — no BS, just real copper and real results.

How To Install The Big 3 (will vary slightly per vehicle make and model)