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Wiring Harness
  • Universal Extra Long Wires 21 Circuit Auto Wire Harness Hotrod Fit for GM Chevy
  • Universal Extra Long Wires 21 Circuit Auto Wire Harness Hotrod Fit for GM Chevy
  • Universal Extra Long Wires 21 Circuit Auto Wire Harness Hotrod Fit for GM Chevy
  • Universal Extra Long Wires 21 Circuit Auto Wire Harness Hotrod Fit for GM Chevy
  • Universal Extra Long Wires 21 Circuit Auto Wire Harness Hotrod Fit for GM Chevy
  • Universal Extra Long Wires 21 Circuit Auto Wire Harness Hotrod Fit for GM Chevy
Universal Extra Long Wires 21 Circuit Auto Wire Harness Hotrod Fit for GM Chevy
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Universal Extra Long Wires 21 Circuit Auto Wire Harness Hotrod Fit for GM Chevy

  • 10 - 49 Pieces
    $113.62
  • 50 - 99 Pieces
    $110.35
  • >= 100 Pieces
    $105.32

Customization:

Customized packaging（Min.Order: 100 pieces）
wire gauge（Min.Order: 100 pieces）
wire color（Min.Order: 100 pieces）
wire length（Min.Order: 100 pieces）
View product details

Universal Extra Long Wires 21 Circuit Auto Wire Harness Hotrod Fit for GM Chevy

Product overview

Core functionalities

Applicable scenarios

Unique advantages

  • 21-Circuit Design: Supports complex automotive systems with multiple connections, enabling efficient power distribution for engines, lighting, and accessories.
  • Color-Coded Wires: Organized by function for easy identification, simplifying installation, troubleshooting, and maintenance.
  • Universal Compatibility: Designed for GM Chevy vehicles and adaptable to other automotive models via modular connectors and terminals.
  • Extra Long Length: Accommodates spacious engine compartments or custom builds requiring extended wiring reach.

Key features

  • 1. Material Technology

    • With copper conductors and durable PVC/Teflon insulation, ensure reliable conductivity and resistance to environmental damage.

  • 2. Interactive Design

    • With robust metal connectors and terminals, securely connect and disconnect automotive components for easy maintenance and upgrades.

  • 3. Performance Parameters

    • With an extra-long design and support for 21 circuits, handle complex automotive systems and custom builds more effectively than standard harnesses*.

  • 4. Scenario Solutions

    • Designed for universal fitment in GM Chevy vehicles and custom hotrod projects, offering broader compatibility compared to brand-specific harnesses*.

  • 5. Certification Standards

    • Certified to automotive safety and durability standards*, ensuring reliable performance in harsh environments.

Product details

Universal Extra Long Wires 21 Circuit Auto Wire Harness Hotrod Fit for GM Chevy

The Universal Extra Long Wires 21 Circuit Auto Wire Harness is a versatile automotive solution designed for hotrod builds and GM Chevy vehicles. Featuring color-coded wires, robust connectors, and durable materials, this harness ensures reliable electrical connectivity while simplifying installation and maintenance. Its extra length and 21 circuits provide flexibility for custom configurations, making it ideal for automotive enthusiasts and professionals.

Technical specifications

FeatureSpecificationBenefit
Color Coding21 circuits with standardized color codesEasy identification and troubleshooting
MaterialCopper conductors with PVC/Teflon insulationHigh conductivity and environmental resistance
ConnectorsMetal (brass/copper) terminals with locking mechanismsSecure, vibration-resistant connections
LengthAdjustable up to 15ft (base model)Accommodates diverse vehicle configurations
CertificationsMeets SAE J1128 and ISO 6722 standardsEnsures automotive-grade reliability

Customization guide

Adjustable parameters include wire length, circuit count, and connector types to meet specific vehicle requirements. For example, extend the harness length by 30% for larger engine compartments or add waterproof connectors for off-road applications.

Get inspired

Customize your hotrod’s electrical system with confidence. Whether upgrading an older GM model or building a modern performance vehicle, this harness simplifies power distribution, lighting, and accessory integration.

Choose your model

ParameterBase ModelAdvanced ModelPro Model
Circuit Capacity21 circuits (fixed)25 circuits (modular)30 circuits (fully customizable)
Insulation ThicknessStandard PVC (2mm)Reinforced Teflon (3mm)Military-grade PTFE (4mm)*
Temperature Range-40°C to 120°C-50°C to 150°C-60°C to 180°C
Weight4.2 lbs3.8 lbs (20% lighter)3.5 lbs (30% lighter)*

Supplier's note

  1. Technical Breakthroughs:

    • Color-Coded Circuits: Simplifies wiring identification, reducing installation errors by 40%.
    • Military-Grade Insulation (Pro Model): Withstands extreme temperatures and chemical exposure, ideal for racing or industrial vehicles.
    • Modular Design (Advanced/Pro): Allows users to add/remove circuits without full replacement, cutting downtime by 50%.

  2. Optimal Version Selection:

    • Base Model: Best for standard hotrod builds or GM Chevy restorations requiring basic circuit needs.
    • Advanced Model: Suitable for high-performance builds needing extra circuits (e.g., LED lighting systems) and improved thermal resistance.
    • Pro Model: Recommended for professional mechanics or extreme-use scenarios (e.g., off-road racing), where durability and extended temperature tolerance are critical.

With the Pro Model’s PTFE insulation, you can safely handle high-voltage components in harsh environments. Pair it with reinforced connectors to ensure zero failures during prolonged use. For casual enthusiasts, the Base Model’s cost-effective design meets everyday needs without compromising safety.

Note: Comparative values (e.g., +30%) are relative to industry benchmarks for similar harnesses.

Frequently asked questions

  • Which GM Chevy models is the Universal Extra Long Wires 21 Circuit Auto Wire Harness suitable for?

  • How does the color-coding in the Universal Extra Long Wires harness simplify hotrod electrical setups?

  • What materials make the 21 Circuit Auto Wire Harness durable for automotive environments?

  • Can the 21 Circuit harness be customized for additional circuits or connectors?

  • How does the harness ensure secure connections in high-vibration engine bays?

  • Is the Universal Extra Long Wires harness SAE-certified for automotive use?

  • What advantages does a 21-circuit design offer over standard automotive harnesses?

  • How should I clean and maintain the harness to extend its lifespan?

Product comparison

CategoryUsage ScenariosCharacteristicsAdvantagesDisadvantages
Circuit CapacityCustom builds, complex electrical systems21 circuits (Base) ▲ 30 circuits (Advanced)
(SAE J1156 standardized color coding)		Advanced supports more components (e.g., aftermarket accessories)Base may limit expansion for high-component vehicles
Material QualityHarsh environments (e.g., engine bays)18 AWG copper (Base) ▲ 16 AWG copper alloy (Advanced)
(Teflon insulation in Advanced)		Advanced withstands extreme temperatures (-40°C to +125°C) ▲
(vs Base: -20°C to +100°C)		Base may degrade faster in high-heat areas
Connector DurabilityFrequent disconnections (e.g., racing)Brass terminals (Base) ▲ Stainless steel (Advanced)
(IP67 rated in Advanced)		Advanced resists corrosion and vibration ▲
(MIL-STD-810G compliant)		Base terminals may corrode over time
Color Coding ComplianceTroubleshooting, diagnosticsSAE J1156 compliant (Both tiers)Universal color standard for easy identification by techniciansRequires training to interpret SAE codes
Length & FlexibilityLarge vehicle layouts (e.g., trucks)15m standard (Base) ▲ 20m extended (Advanced)
(ISO 5748 flexibility rating)		Advanced reaches distant components without splicing ▲Base may require adapters for long-distance wiring
Temperature ResistanceExtreme climates (e.g., off-road vehicles)-20°C to +100°C (Base) ▲ -40°C to +125°C (Advanced)
(ASTM D2240 verified)		Advanced operates in Arctic/Desert conditions ▲Base risks failure in prolonged extreme temperatures

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