Nexus V8 IGN-1A GM/Chrysler Harness

Overview

The Nexus V8 IGN-1A GM/Chrysler Harness bridges your Haltech Nexus ECU directly to GM and Chrysler V8 coil packs, eliminating the complexity of custom wiring looms. Purpose-built for high-output IGN-1A inductive coils, this plug-and-play harness delivers clean ignition signals with OEM reliability. Essential for LS swaps, late-model Hemi builds, and any GM/Chrysler V8 conversion where you need bulletproof ignition control without the fabrication headaches.

Technical Specifications

• Part Number: HT-186060
• Application: GM/Chrysler V8 engines with IGN-1A coils
• ECU Compatibility: Haltech Nexus R3/R5 series
• Harness Type: Coil pack extension with OEM-style connectors
• Wire Gauge: High-temperature automotive specification
• Length: Optimised for typical V8 engine bay layouts

Why You Need This

GM and Chrysler V8s use specific coil pack connector pinouts that don't match generic aftermarket harnesses. Without the correct harness, you're left splicing wires, dealing with voltage drops, or worse — intermittent misfires that destroy engines under boost. The IGN-1A coils deliver serious spark energy (perfect for high-compression naturally aspirated builds or forced induction), but they need clean, direct connections to perform.

We see this constantly in the workshop: customers attempting LS3 swaps into everything from drift cars to kit cars, or building serious power on 6.1 Hemi engines. The ignition system is often the weak link — not because the coils can't handle the power, but because the wiring lets them down. This harness eliminates that problem entirely. Whether you're running a stock cam LS1 or a boosted 408 stroker, reliable ignition timing is non-negotiable. One misfire at the wrong moment costs pistons.

ECU & System Compatibility

Designed specifically for Haltech Nexus R3 and R5 ECUs paired with GM/Chrysler V8 applications using IGN-1A high-output inductive coils. This harness integrates seamlessly with the Nexus ignition drivers, providing the correct impedance matching and signal integrity these high-energy coils demand. Contact our technical team to confirm compatibility with your specific engine combination and coil setup.

What's in the Box

• Complete V8 ignition harness with GM/Chrysler coil pack connectors
• Nexus ECU connection terminals
• Installation documentation

Complete Your Build

Most customers fitting this harness are completing serious GM or Chrysler V8 conversions and need supporting components. Consider pairing with Haltech wideband controllers for closed-loop fuelling, CAN keypads for dash integration, and quality engine position sensors. Our technical team can spec a complete Nexus package based on your power goals and chassis requirements. With Billy's UK stock and pre-sales consultation, we ensure your ignition system matches your build's ambition from day one.