Red 4-Hole Wire Loom

The Red 4-Hole Wire Loom from Moroso is a purpose-built engine bay harness management solution designed for automotive enthusiasts and professional mechanics tackling custom wiring installations. This compact loom serves as the backbone of organized electrical routing in performance builds, restorations, and custom engine swaps where factory harness configurations don't apply. Whether you're upgrading an ignition system, integrating aftermarket fuel injection, or rewiring a complete engine bay, this loom provides the structure needed to keep critical wiring bundles protected and systematically arranged away from heat sources and moving engine components.

Constructed with a red spiral wrap design, this 4-hole wire loom accommodates multiple wire gauges while maintaining separation and protection for individual circuits—critical for preventing electromagnetic interference and cross-talk in sensitive ignition and fuel management applications. The four mounting holes allow secure anchoring to engine block bosses, firewall provisions, or custom brackets, ensuring the loom remains stationary under vibration and thermal cycling. Moroso's engineering ensures the material withstands under-hood temperatures and resists abrasion from sharp edges, protecting your wiring investment from chafing damage that could lead to shorts or system failures during operation.

This wire loom is ideal for street rod builders, engine swap specialists, and anyone standardizing wiring in carbureted or fuel-injected custom applications. Its compact dimensions—5.4 inches in length with a 0.65-inch outer diameter—make it versatile enough for tight engine bay layouts while providing ample wire capacity. Installation requires only basic fasteners at the four mounting holes; no cutting or modification of the loom itself is needed. Compatible with any ignition, fuel, or auxiliary circuit, this Moroso loom works equally well in domestic muscle car restorations, vintage imports, and modern performance builds.