MFT-H-LINK-34

Motorsport Terminating Header Jig — Link 34-way ECU Harness Building Tool

The MFT-H-LINK-34 is a motorsport terminating header jig for Link G4X/G4+ 34-way ECU connector. A terminating header jig is a specialist harness-building tool that holds the ECU connector housing in a fixed, correctly-oriented position during harness fabrication, allowing the harness builder to insert crimped contacts into the connector housings accurately and consistently without needing to hold the connector freehand. The jig is specifically profiled for Link G4X and G4+ ECU models with 34-way primary connectors, widely used in Scandinavian club motorsport, time attack, and performance road car applications for their comprehensive feature set and tuning accessibility.

What Is a Terminating Header Jig and Why Is It Used?

High-density ECU connectors — particularly the Superseal 1.0 and multi-way Econoseal format connectors used on MoTec, Haltech, Link, FuelTech, and other professional motorsport ECUs — contain a large number of small contact positions that must each be populated with precisely crimped contacts. Attempting to insert contacts into a high-density ECU connector while holding the connector freehand with one hand creates several problems: the connector can shift during insertion, making it difficult to confirm each contact is correctly seated; the build posture is awkward and tiring during a long harness build session; and there is a risk of bending or damaging contacts in adjacent positions while inserting the target contact. A terminating header jig clamps the connector at the correct working angle on the bench, freeing both hands for the contact insertion tool and the wire, and allowing a stable, repeatable insertion action for every contact position in the connector.

ECU-Specific Jig — Link 34-way

This jig is dimensioned and profiled specifically for the connector format used on Link G4X and G4+ ECU models with 34-way primary connectors, widely used in Scandinavian club motorsport, time attack, and performance road car applications for their comprehensive feature set and tuning accessibility. ECU connector jigs are not universal — each ECU manufacturer uses specific connector formats, body shapes, and locking geometries that require a matching jig profile to hold the connector correctly without applying stress to the connector body or contact insert. Using the correct jig for the specific ECU connector ensures the housing is held securely in the correct orientation throughout the harness build session.

Professional Harness Building Tool

Terminating header jigs are standard equipment in professional motorsport harness workshops. For builders fabricating ECU harnesses on a regular basis — race teams preparing multiple vehicles, harness shops building harnesses for customer ECU installations, or workshops maintaining a fleet of race cars through a season — the jig significantly reduces the time and effort required for each ECU connector build and improves contact insertion consistency across the full connector face.

Available from Arctic Performance Parts

Arctic Performance Parts stocks terminating header jigs for the major professional motorsport ECU platforms used across Scandinavia, including MoTec, Haltech, Link, and FuelTech. Lead time 1–2 weeks for quantities beyond current stock.