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Holley EFI

Holley EFI Flame Retardant Split-Wire Loom

5/8 inch Nomex Split Loom 10 ft

Part # 573-203
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Wiring any high performance application can present any number of installation challenges. One of the challenges we often encounter is extreme temperature, be it from header tubes, turbo manifolds, or other potential sources of heat. Keeping your wiring safe is critical to ensure your engine and or electrical system continues to function as desired. Our new Nomex® Holley EFI Split Loom is engineered specifically to protect your investment from these high temperature conditions. This Nomex® Split Loom has an operating temperature range from -76F to +392F, and is self-wrapping, making installation quick and easy. This woven Nomex® loom also cuts easily with a pair of quality scissors, no special tools required.


  • Operating Temp. from -76°F to 392°F, keeps your wirings safe in the most extreme situations
  • Fire Retardant to prevent damage to your wiring in the event of short term flame exposure
  • Cuts Easily With Scissors, allowing you to quickly trim the loom
  • Self-Wrapping woven, Genuine Nomex® Split Loom ensures easy and clean installation

About Holley EFI

Holley is the new standard in EFI! Whether you're engine swapping your classic car or need to manage 4000 horsepower in your twin-turbocharged drag radial race car, Holley EFI has the solutions you need to get your project up and running better than ever!

Brand Holley EFI
Product TypeWire Loom
Part Number573-203
When updating your ECU firmware, you MUST unplug the CAN Splitter from them main harness. Plug the device updating the ECU Firmware directly into the Main Harness.

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