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Professional-Grade Wiring for GM LS2 & LS3 Engines

Unlock the full potential of your GM LS-series engine with the Holley EFI Main Wiring Harness. Specifically engineered for LS2 and LS3 platforms utilizing a 58x reluctor wheel, this harness is the backbone of a high-performance Holley HP or Dominator EFI setup. It eliminates the guesswork of custom wiring, providing a clean, factory-style installation for your engine management system.

Engineered for Performance

• Precision Fitment: Tailored specifically for LS2 and LS3 engines to ensure perfect sensor reach and connector alignment.
• 58x Reluctor Compatibility: Optimized for modern GM ignition systems for precise timing and fueling control.
• System Integration: Fully compatible with Holley HP and Dominator EFI systems, allowing for advanced tuning capabilities.
• Durable Materials: High-temperature automotive-grade wiring protected by abrasion-resistant shielding to withstand harsh engine bay environments.

This harness simplifies the installation process, allowing you to focus on tuning for maximum horsepower and torque. By replacing outdated or damaged factory wiring, you ensure consistent signal delivery to your ECU, preventing common electrical gremlins that plague high-output builds. Whether you are building a street machine or a dedicated track car, this main harness provides the reliability required for consistent performance. Experience the difference in quality and ease of installation with components sourced from GGCRACING.