Alternator Wire Harness Extension 36in Early LS

The Alternator Wire Harness Extension 36in Early LS by ICT BILLET is a purpose-built electrical adapter designed for GM LS-series engine swaps and modern V8 conversions. This harness bridges the gap between factory alternator connectors and modern engine bay wiring layouts, eliminating the need for custom fabrication or splicing. Whether you're performing a classic muscle car LS swap, upgrading a street rod, or installing a crate engine in a non-GM platform, this extension harness solves real-world routing challenges where original harness length falls short of the alternator location.

Engineered for LS-series alternators, this harness features four-pin connectors that mate directly with standard GM LS alternator plugs, ensuring secure electrical continuity without modification. The 36-inch length provides sufficient reach for common swap scenarios while remaining compact enough to route cleanly through engine bays without excess slack. ICT BILLET's precision-molded connectors and durable insulation withstand engine heat, vibration, and underhood moisture exposure—critical factors in performance and street applications where reliability directly impacts engine function and charging system longevity.

This extension harness is ideal for builders working with early LS variants (LS1, LS2, LS3, or comparable generations) in non-factory applications, particularly those with custom engine bay layouts that demand additional connector distance. Installation is straightforward: simply connect the harness between your alternator and the vehicle's main charging circuit. The compact 0.11 lb weight and manageable dimensions make it easy to integrate into tight engine compartments. For anyone undertaking a professional-grade engine conversion or performance build, this ICT BILLET harness eliminates guesswork and ensures OEM-level electrical integrity from day one.