Service
Custom Wiring Harness Design
Quote-Based
Not every build fits a standard harness. If you have a unique swap, unusual platform, or non-standard ECU, SVK Works builds fully custom harnesses from scratch — designed around your exact requirements, routed for your specific chassis, and built to last.
- Any engine and ECU combination supported
- Custom routing designed for your chassis
- New wire, OEM-spec connectors, motorsport materials
- All circuits tested for continuity before shipping
- Optional MILSpec connector upgrade available
- Turn-key engine start guarantee
The Process
Start by contacting us with the details of your build: engine, ECU, chassis, and any special requirements. We'll review the scope, ask clarifying questions, and provide a quote. Once confirmed, we design, build, and test the harness before shipping it to you or arranging local fitment.
Built to Order
Lead Time Varies by Complexity
FAQ
Common Questions
The more detail the better — engine (make, model, variant), ECU (brand and model), chassis/platform, left- or right-hand drive, and any special requirements like dual ECU, MILSpec connector, or unusual sensors. If you're unsure on any of these, just share what you know and we'll work through the rest together.
Yes. We build for all major standalone ECUs including Haltech, Link, MaxxECU, ECUMaster, FuelTech, Motec, and more. If your ECU isn't one we've built for before, we'll review the pinout documentation and accommodate it.
Our catalog harnesses (MK4 Supra, MK3 Supra, SC300/SC400) are pre-engineered for those specific platforms with known variables. A custom harness is for anything outside those platforms or with significant deviations — different engine, different chassis, unusual ECU, or exotic application like race cars and purpose-built vehicles.
Lead time depends on the complexity of the build and current workload. Simple custom harnesses can often be completed in 4-6 weeks. More complex builds may take longer. We'll give you an estimated timeline at the quoting stage.