Hooker Harness
Hooker Harness — Plug-and-Play Wiring Harnesses for Engine Swaps & Performance Builds
Hooker Harness takes one of the most time-consuming and error-prone aspects of an engine swap — the wiring — and turns it into a straightforward, plug-and-play installation. Engineered specifically for LS, LT, and other modern engine swap applications in classic and custom chassis builds, Hooker Harness products eliminate the custom wiring work that has historically required professional fabrication or extensive electrical knowledge to execute correctly.
Engine Swap Wiring Harnesses
Hooker Harness engine swap harnesses are pre-terminated, labeled, and routed for the most popular swap combinations — connecting the engine ECU, sensors, ignition system, and ancillary outputs to a clean, organized harness that integrates with the vehicle's existing electrical system without cutting, splicing, or custom fabrication. Every connector is OEM-quality, every wire is correctly gauged for the circuit it serves, and every termination is sealed and protected for long-term reliability in the engine bay environment.
Harnesses are available for GM LS and LT engine families across a range of ECU platforms — including Holley Terminator X, HP EFI, and Dominator ECU — as well as factory ECU retention applications where the OEM engine management system is being carried over into the swap chassis. Ford Coyote swap harness options are available for select applications.
Transmission Control Integration
For swaps running electronic automatic transmissions — including the 4L60E, 4L80E, 6L80E, and 8L90E — Hooker Harness produces transmission control wiring that integrates with Holley Terminator X Max and other standalone TCU platforms. Clean transmission wiring is as critical as engine wiring for a reliable, drivable swap — Hooker Harness addresses both in a coordinated system rather than leaving the transmission wiring as an afterthought.
Chassis & Accessory Wiring
Beyond the engine and transmission, Hooker Harness produces chassis wiring solutions for classic vehicles undergoing full electrical upgrades alongside an engine swap. Fuse block kits, relay panels, and accessory wiring harnesses provide a clean, modern electrical foundation for builds that are replacing aging OEM wiring with a purpose-built system rated for the current demands of a modern engine and its supporting components.
Common Applications
Hooker Harness products are engineered for the most popular engine swap combinations — GM LS1, LS2, LS3, LS6, LS7, LSA, and LSX engines into classic GM A-body, F-body, and G-body chassis, as well as custom and tube-frame builds. LT1, LT4, and LT5 swap harnesses cover the Gen V GM platform for builds targeting the latest generation of GM V8 performance. Application-specific harness routing and connector placement are designed for each engine and ECU combination to minimize installation time and eliminate guesswork.
Build Quality & Engineering
Hooker Harness products are manufactured using OEM-grade wire, connectors, and terminals — not the undersized, generic components found in budget wiring kits. Harnesses are assembled, tested, and labeled before shipment, with each circuit identified for straightforward installation without a wiring diagram in hand. Heat-shrink tubing, split loom, and conduit protect the harness from abrasion, heat, and moisture in the engine bay environment.
Installation Notes
Hooker Harness installations are designed to be completed by a builder with basic electrical knowledge and standard hand tools. Each harness includes detailed installation instructions with connector identification, routing guidance, and power/ground connection points. Integration with Holley EFI platforms is seamless when using matched Holley ECU and Hooker Harness combinations — the systems are engineered to work together. Professional installation is recommended for builds combining multiple electrical systems or requiring custom routing in non-standard chassis configurations.
Shop Hooker Harness at Ozkonic Kustomz
Browse the full Hooker Harness lineup below — engine swap harnesses, transmission control wiring, chassis electrical kits, and accessories. If you need help identifying the correct harness for your engine, ECU, and chassis combination, reach out. Clean wiring is the foundation of a reliable swap, and we'll help you get it right.
