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Holley EFI 558-115 - Gen III Hemi Main Harness, Early, w/ TPS and Idle Air Control Connections

Gen III HEMI Main Harness w Throttle Position Sensor & Idle Air Control, For use with Cable Throttle Body.

Gen III HEMI Harness with TPS and Idle Air Control Connections.
This wiring harness interfaces a Holley EFI ECU to a Gen III HEMI engine with an aftermarket cable actuated throttle body. It is meant to be used in conjunction with an injector harness, a coil harness, and two ignition modules. Most stock sensors are used with this harness. There are two optional connectors for interfacing with CAN-based Holley modules.
Availability: Call to check stock.
Shipping: Free Shipping* On Orders Over $99!
Pricing: $588.95

Free U.S. Continental Shipping


Gen III Hemi Main Harness with IAC motor wiring/connector and TPS wiring/connector for a manual throttle body application
Take control of your Gen III HEMI with Holley EFI by controlling fuel and spark. Great for power upgrades and engine swaps.
Capable of tuning with power adders such as nitrous, superchargers or turbos and compatible with methanol and water injection
Harnesses are available to connect to a Gen III HEMI engine for the most advanced fuel and timing controls available
Each Harness is designed in fit and function specifically for the Gen III HEMI engine platform
All wiring is TXL grade copper wiring with minimal weight, high temp sleeve in a small diameter
Factory style terminations provide a strong, secure connection
Connectors are OEM grade for a correct, positive fit
Each harness is routed through a split-loom braid for protection and great looks

California Proposition 65

California Prop 65WARNING: Cancer & Reproductive Harm -


NOTE: The TPS and IAC connectors are designed for Holley 4 BBL style throttle bodies. If you are using a different throttle body, you may have to change the pins and connectors.


  • 558-115
  • 558-115
  • 090127727447
  • Holley EFI
  • Call to check stock.
  • New


Shipping Information

  • Item Requires Shipping
  • 4.0 lbs.
  • W4.0000” x H11.0000” x L10.5000”
  • Free U.S. Continental Shipping
  • Free Shipping* On Orders Over $99!


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