Holley EFI 558-491 Computer Chip Programmer Input Cable
Holley EFI 558-491 Computer Chip Programmer Input Cable
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Holley Sniper EFI

Holley EFI 558-491 Computer Chip Programmer Input Cable

5 stars out of 2 reviews
(5.0)|
2 ratings
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Key item features

  • Labeled Wires: The input cable features individually labeled wires, simplifying identification during installation and setup for various connections.
  • Versatile Inputs: This harness provides two 3-log input wires and two ground reluctor inputs, suitable for functions like AC kick and NOS stage activation within Sniper EFI systems.
  • Multiple Outputs: Included are one 3-long output wire, two 5-long output wires, and three ground reluctor outputs, enabling control for electronic fan operation or A/C shutdown at wide-open throttle.
  • Specialized Outputs: The cable incorporates a 5-tachometer output and a 3-points output wire for specific system functionalities.
  • Digital Gauge Connectivity: A 5-long digital gauge output is provided, specifically designed for connecting to Holley EFI analog gauges.
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5 out of 5 stars
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Showing 1-2 of 2 reviews

Sep 9, 2025
TonyBaloney
5 out of 5 stars review

Works great

Arrived fast, worked great. Used it to wire up fans and AC to the Sniper. Silly the sniper doesn't come with the harness, but works as expected.

Review from jegs.com
Helpful?4577GZ1OV0LO775507999
Jun 14, 2021
Tommy 1
5 out of 5 stars review

awesome

I would have thought with all the $$$$$$ spent on EFI and set up would have come with the unit.

Review from jegs.com
Helpful?4577GZ1OV0LO775507999