Support & FAQ

A standalone wiring harness replaces your factory engine wiring with a purpose-built harness that only includes the wires needed for your specific engine and ECU combination. It eliminates decades of degraded wiring, removes unnecessary circuits, and provides a clean, reliable electrical foundation for your build.

Standard harnesses typically have a 3-4 week lead time. More complex builds (MK3 swaps, race harnesses, custom chassis) may take 4-6 weeks. Rush orders may be available — contact us to discuss your timeline.

We build harnesses for all major aftermarket ECUs including Haltech Elite, Link G4X/G4+, AEM Infinity, Motec M1/M150, FuelTech, MaxxECU, and more. Each harness includes the ECU connector pigtail wired to your specific pinout. If your ECU isn't listed, contact us and we'll work it in.

Yes. Our harnesses are designed for your specific chassis and engine combination. All engine-side connectors match OEM specifications so they plug directly into your injectors, coils, sensors, and actuators. The ECU side is pinned for your specific ECU model.

Standard harnesses use TXL cross-linked polyethylene wire, which is rated for automotive temperatures and vibration. Connectors are OEM-quality Toyota, Sumitomo, and Deutsch connectors. For race applications, we offer Raychem Spec 44 mil-spec wire with Autosport/Deutsch DTM connectors.

Every harness ships with a wiring diagram and installation guide. We also provide email and phone support during your installation. If you get stuck, we'll walk you through it. Check our Resources page for additional wiring diagrams and technical documentation.

Absolutely. We build custom harnesses for a wide range of engines and chassis combinations. If you don't see your specific setup listed, contact us with your engine, chassis, and ECU details and we'll provide a custom quote.

Since every harness is custom-built to your specifications, we cannot accept returns on custom orders. However, if there's an issue with your harness (wrong pinout, defective connector, etc.), we'll make it right. Connector kits and accessories can be returned within 30 days if unused and in original packaging. See our full Return Policy.

Yes, we ship worldwide. Domestic orders ship via USPS Priority or UPS. International orders ship via USPS Priority International or UPS Worldwide. Shipping cost and delivery times are calculated at checkout based on your location. Customs duties and import taxes are the responsibility of the buyer.