What is Tefzel wire and why is it used in motorsport wiring?

Tefzel is a brand name for ETFE (Ethylene Tetrafluoroethylene) fluoropolymer wire. It is the go-to wire for professional motorsport and aerospace wiring because it is rated to 150C, 600V, and has exceptional resistance to fuels, oils and chemicals. It is also significantly lighter and more flexible than standard automotive wire at the same gauge, making it ideal for weight-sensitive race car applications.

What AWG wire should I use for my engine management wiring?

For most ECU signal wiring including sensors, triggers and outputs, 20 or 22 AWG Tefzel is standard. For injector and coil wiring, 18 AWG is commonly used. For power feeds, fuel pumps and high current circuits, 16 AWG or heavier is recommended.

What is the difference between Deutsch DTM, DT and DTP connectors?

The DTM series is a miniature waterproof connector rated to 7.5A per pin, ideal for ECU signal wiring and sensors. The DT series is larger, rated to 13A per pin, and is the most widely used connector in motorsport wiring harnesses. The DTP series is a high current connector rated to 25A per pin, used for fuel pumps, fans and other high draw applications.

What is Raychem DR-25 and why is it used instead of standard heatshrink?

Raychem DR-25 is a military specification heatshrink tubing rated to 150C with a 2:1 shrink ratio. Unlike standard heatshrink, DR-25 is flame retardant and resistant to fuels, hydraulic fluids, lubricating oils and aviation fuels. It is the industry standard for motorsport and aerospace wiring harness sleeving.

Should I solder or crimp my motorsport wiring connections?

Crimp every time. Soldering is actively discouraged in professional motorsport wiring because solder creates a hard point in the wire that can crack and fail under the constant vibration of a race car. A correctly executed crimp with the proper tool creates a gas-tight cold weld between the wire strands and the terminal.

What is a PDM and do I need one?

A PDM (Power Distribution Module) replaces traditional fuse boxes and relay panels with a single programmable device. It controls all switched outputs in the vehicle, provides overcurrent protection, and integrates with your ECU for data logging and diagnostics. PDMs save weight, reduce wiring complexity and make fault finding much easier.

How long does a full vehicle rewire take?

A full vehicle rewire at 12Volt Motorsports typically takes between 2 and 6 weeks depending on the complexity of the build, the number of systems involved and the level of finish required. Simple engine bay rewires with a new ECU can be completed faster. Contact us early to discuss your project and timeline.

Do you ship parts Australia wide?

Yes. We ship all products Australia wide. Most in-stock orders are dispatched within 1-3 business days. We stock genuine Haltech, Deutsch, Raychem and Tefzel products so what you see on the website is what we use in our own builds.

Does an aftermarket ECU make my car more powerful?

Not by itself. An ECU is not a power adder. What it does is give a professional tuner the ability to precisely calibrate your engine's fuel delivery, ignition timing, boost control and cam timing to extract the full potential from your existing setup. The power gains come from the quality of the tune, not from the ECU alone.

Which ECU brand should I choose for my build?

Haltech is our primary recommendation for most Australian performance builds. Motec suits professional motorsport at the highest level. Emtron is an Australian-made ECU sitting between Haltech and Motec. Holley EFI suits American V8 applications. FuelTech is the preferred choice for serious drag racing. Contact us on 0458 102 134 to discuss which suits your specific build.

What is flex fuel and can my ECU run it?

Flex fuel means the ECU can automatically adjust fuelling and ignition timing on the fly depending on how much ethanol is in the fuel, so you can run anywhere from standard 98 octane petrol to E85 or any blend without re-tuning. All current Haltech, Emtron, Motec, Holley and FuelTech ECUs support flex fuel with the addition of an ethanol content sensor.

Can you install an aftermarket ECU on any car?

Most wire-in ECUs from Haltech, Motec, Emtron, Holley and FuelTech can be fitted to any vehicle with a custom wiring harness. Haltech also makes plug-in ECUs for popular platforms including Nissan Skyline R32/R33/R34, Mazda RX-8 and GM LS engines. We build custom harnesses for all makes and models.

13+ Pin Connectors

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Vendor:Souriau

Souriau 8STA016-26SN + 8STA616-26PN Matched Pair, 26 Pin Size 20 Contacts

This matched pair contains the Souriau 8STA016-26SN oval flange receptacle and the Souriau 8STA616-26PN plug, shell size 16, 26 contacts, guaranteed to mate. Both connectors share shell size 16, insert arrangement 16-26 and the red N keyway, so this listing gives you both halves...

From $288.73

From $288.73

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Souriau 8STA016-35SN + 8STA616-35PN Matched Pair, 55 Pin Size 22 Contacts

This matched pair contains the Souriau 8STA016-35SN oval flange receptacle and the Souriau 8STA616-35PN plug, shell size 16, 55 contacts, guaranteed to mate. Both connectors share shell size 16, insert arrangement 16-35 and the red N keyway, so this listing gives you both halves...

From $346.51

From $346.51

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Vendor:Souriau

Souriau 8STA020-35SN + 8STA620-35PN Matched Pair, 79 Pin Size 22 Contacts

This matched pair contains the Souriau 8STA020-35SN oval flange receptacle and the Souriau 8STA620-35PN plug, shell size 20, 79 contacts, guaranteed to mate. Both connectors share shell size 20, insert arrangement 20-35 and the red N keyway, so this listing gives you both halves...

From $440.00

From $440.00

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Vendor:Souriau

Souriau 8STA020-41SN + 8STA620-41PN Matched Pair, 41 Pin Size 20 Contacts

This matched pair contains the Souriau 8STA020-41SN oval flange receptacle and the Souriau 8STA620-41PN plug, shell size 20, 41 contacts, guaranteed to mate. Both connectors share shell size 20, insert arrangement 20-41 and the red N keyway, so this listing gives you both halves...

From $362.91

From $362.91

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Vendor:Souriau

Souriau 8STA022-35SN + 8STA622-35PN Matched Pair, 100 Pin Size 22 Contacts

This matched pair contains the Souriau 8STA022-35SN oval flange receptacle and the Souriau 8STA622-35PN plug, shell size 22, 100 contacts, guaranteed to mate. Both connectors share shell size 22, insert arrangement 22-35 and the red N keyway, so this listing gives you both halves...

From $508.19

From $508.19

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Vendor:Souriau

Souriau 8STA624-37PN

Souriau 8STA624-37PN is an 8STA plug connector, size 24, with 37 contacts and pin contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$293.43

$293.43

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Vendor:Souriau

Souriau 8STA024-37SN

Souriau 8STA024-37SN is an 8STA flange connector, size 24, with 37 contacts and socket contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$356.90

$356.90

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Vendor:Souriau

Souriau 8STA014-35SA

Souriau 8STA014-35SA is an 8STA flange connector, size 14, with 37 contacts and socket contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$150.90

$150.90

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Vendor:Souriau

Souriau 8STA622-54PN

Souriau 8STA622-54PN is an 8STA plug connector, size 22, with 53 contacts and pin contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$254.60

$254.60

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Vendor:Souriau

Souriau 8STA022-54SN

Souriau 8STA022-54SN is an 8STA flange connector, size 22, with 53 contacts and socket contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$306.96

$306.96

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Vendor:Souriau

Souriau 8STA616-20PN

Souriau 8STA616-20PN is an 8STA plug connector, size 16, with 20 contacts and pin contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$164.11

$164.11

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Vendor:Souriau

Souriau 8STA016-20SN

Souriau 8STA016-20SN is an 8STA flange connector, size 16, with 20 contacts and socket contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$176.73

$176.73

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Vendor:Souriau

Souriau 8STA016-99SN

Souriau 8STA016-99SN is an 8STA flange connector, size 16, with 23 contacts and socket contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$150.61

$150.61

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Vendor:Souriau

Souriau 8STA616-99PN

Souriau 8STA616-99PN is an 8STA plug connector, size 16, with 23 contacts and pin contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$154.37

$154.37

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Vendor:Souriau

Souriau 8STA024-04SN

Souriau 8STA024-04SN is an 8STA flange connector, size 24, with 56 contacts and socket contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$287.77

$287.77

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Vendor:Souriau

Souriau 8STA624-04PN

Souriau 8STA624-04PN is an 8STA plug connector, size 24, with 56 contacts and pin contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$276.69

$276.69

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Vendor:Souriau

Souriau 8STA024-35SN

Souriau 8STA024-35SN is an 8STA flange connector, size 24, with 128 contacts and socket contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$367.13

$367.13

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Vendor:Souriau

Souriau 8STA622-35PN

Souriau 8STA622-35PN is an 8STA plug connector, size 22, with 100 contacts and pin contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$224.05

$224.05

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Vendor:Souriau

Souriau 8STA624-19PN

Souriau 8STA624-19PN is an 8STA plug connector, size 24, with 19 contacts and pin contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$299.29

$299.29

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Vendor:Souriau

Souriau 8STA624-19SN

Souriau 8STA624-19SN is an 8STA plug connector, size 24, with 19 contacts and socket contacts. Souriau 8STA connectors are compact motorsport circular connectors used for professional engine harnesses, ECU wiring, bulkhead connections, sensor looms, PDM wiring and custom motorsport electrical systems. Connector Details Part...

$407.72

$407.72

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