12V Primary Wire (GXL / TXL)

(4 customer reviews)

$14.45$49.95 (USD)

Our high-temperature primary wire is rated 125°C (257°F) and is ideal for hot engine compartments and general wiring. With proven automotive performance, GXL and TXL primary wire is the go-to wiring for hard-to-fit areas in cars, trucks, trailers, boats, and much more.

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SKU: WC-GXL/TXL Category:


12V Primary Wire (25ft GXL / TXL)


Thin wall GXL / TXL is flexible, shape-retaining, and easy to handle, with its characteristic cross-linked polyethylene (XLPE) insulation providing high-temperature protection up to 257°F (125°C).

12V Primary Wire (25ft GXL / TXL)


Pure, high-quality stranded copper means reliable wiring every time. Meets or exceeds SAEJ1126, Ford ESB-M1L85A, and Chrysler MS-8900 specifications. Although advertised for 12vDC, GXL wire can handle up to 50vDC.

12V Primary Wire (25ft GXL / TXL)


Primary GXL and TXL wire is the go-to wiring for hard-to-fit areas in cars, trucks, trailers, boats, and much more. Strips beautifully and can be run neatly given it’s ability to retain shape. Available in multiple colors and sizes.

txl vs gxl primary wire

GXL vs. TXL Primary Wire

Both GXL and TXL primary wire are insulated with high-temperature resistant cross-linked polyethylene. TXL, however, has thinner insulation and lower weight than its GXL counterpart. In practice, the thicker GXL is often used for engine compartment wiring while the thinner, more flexible TXL is used for everything else.

But in the end, there’s not much difference between TXL and GXL. With either wire, you’ll get the proven resilience, quality, and low cost that car enthusiasts need.

Available Primary Wire Colors and Sizes
color coded sizes that are standard across the automotive industry

Thin wall GXL

18 AWG
16 – 14 AWG
12 – 10 AWG

Extra thin wall TXL

18 AWG
16 AWG
14 AWG
12 AWG

What size wire do you need?
primary wire is designed for automotive circuitry

Choosing the correct size automotive primary wire depends on the acceptable voltage drop, length of the feeder/branch circuit conductor, load amperage, and the ambient temperature of the compartment where the wire will pass through (or originate from).

Use our interactive chart to find the right wire size for your project

Go to wire gauge chart

12V Primary Wire (25ft GXL / TXL)

TXL & GXL Wire Specifications
what makes primary wire a leader in automotive circuit wiring

Sizes Various sizes #18 to #8 AWG
Conductor Copper
InsulationCross-linked polyethylene (XLPE)
Wall ThicknessTXL: Extra Thin | GXL: Thin
Temperature Rating -40°F to +257°F (-40°C to 125°C)
Rated Voltage 60vDC | 25vAC
Certifications Meets or exceeds Ford (M1L-85B), Chrysler (MS-8900) and SAE J-1127 requirements

4 reviews for 12V Primary Wire (GXL / TXL)

  1. theowoodward (store manager)

    Its actual gxl. Really thin but highquality. Feels good and works well, flexible but not weak.

  2. Michael Cari (verified owner)

  3. Ben (verified owner)

    Great customer service.

  4. Dustin (verified owner)

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Before finalizing your purchase

It is important to familiarize yourself with the MGI panel Installation Manual. Not only does this help you to select the appropriate options for your race panel, it will enable you to tackle any troubleshooting issues with confidence.