SKU: 42874630900

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

Sale price$404.98 Regular price$449.98
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Ships within 48 hours · Estimated delivery Aug 28 - Sep 2

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Description

Gen III Hemi Main Harness Early w/ TPS and Idle Air Control Connections 558-115Overview: 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. Features: Gen III Hemi

Overview:

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.

Features:

  • 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

Application:

Year Make Model Submodel Engine Size
Universal

Specs:

Brand Holley EFI
Emission Code 4
Harness Application HEMI
Harness Type Main
Ignition Type GEN III HEMI
Product Type Hemi Main Engine Harness
Shipping Notes
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Exchange/Return Notes
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SKU: 42874630900

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Kimberly Morgan
Cuba, US
★★★★★ 5
Delicious
Flavor Name: Butterscotch
Great flavor.
WAS THIS REVIEW HELPFUL?YesReportShare
Reviewed in the United States on June 7, 2026
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NewEnglandGirl
Grantham, US
★★★★★ 5
Yummy
Flavor Name: Butterscotch
I'm very picky about taste, especially the coffee syrup. I have tried several and most do not even taste like the "name" on the bottle. I decided to try this one and it is so good, it tastes like butterscotch. Mmmmm The pump works fine and 2 squirts is perfect.
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Reviewed in the United States on March 6, 2026
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Eddie
Boise, US
★★★★★ 5
Delicious
Flavor Name: Butterscotch
I’m not a huge flavored coffee type of person, but butterscotch is a weakness of mine and this is good
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Reviewed in the United States on March 21, 2026
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someone's Buttercup
Los Angeles, US
★★★★★ 4
Tastes good
Flavor Name: Butterscotch
I like the butterscotch taste. It’s really good with caramel coffee. The pump isn’t exactly smooth so it splashes a bit. When you first insert the pump into the bottle, be sure the pump is twisted into the open position.
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Reviewed in the United States on February 5, 2026
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Kathryn C.
Dallas, US
★★★★★ 5
Best tasting!
Flavor Name: Butterscotch
Fantastic flavor. All thumbs up. Have purchased many other commercial butterscotch flavors. This is my favorite.
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Reviewed in the United States on March 23, 2026

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