LS Coil Wire Harness

The ICT Billet LS Coil Wire Harness (WEC0I35) is a direct replacement ignition wiring harness engineered for GM LS-series engines. This harness delivers the critical electrical pathway between the engine control module and coil packs, ensuring reliable spark timing and consistent engine ignition performance across all throttle conditions and operating scenarios.

Precision-manufactured by ICT Billet, a recognized leader in LS engine wiring and electrical components, this coil harness is built to OEM-level specifications for direct fitment. The harness maintains the exact connector configuration and pin assignments required for LS engine families, eliminating guesswork during installation. Proper ignition harness quality is fundamental to engine reliability—poor electrical connection or degraded insulation can cause misfires, rough idle, and starting difficulties that cascade into difficult diagnostics.

This replacement harness is essential for LS engine builders, swap technicians, and performance enthusiasts restoring or upgrading ignition systems after coil pack failures, harness damage, or custom engine bay routing. Whether addressing a failed original harness, installing aftermarket coil packs, or completing a full LS swap into a classic or modern chassis, this harness provides the electrical integrity needed for stable engine operation and reliable starting.

Compact and lightweight at 0.24 lbs with dimensions of 4 × 1.5 × 9 inches, the harness integrates easily into engine compartments with space constraints. Each unit is individually packaged and ready for same-day installation on compatible LS applications.