2009-and-newer Gen III HEMI engines shipped from the factory with Variable Valve Timing. This plug-and-play sub harness lets a Terminator X or Terminator X Max ECU control and tune the VVT solenoid, and it also includes a pre-wired connector for the factory Short Runner Valve actuator on stock intake manifolds so you can capitalize on its low-RPM torque benefits.
Specifications:
- Application: 2009+ Gen III HEMI engines with Variable Valve Timing (VVT)
- Compatible ECUs: Terminator X, Terminator X Max only
- Minimum software: Terminator X V2.0.50 (Firmware/Software V2 Build 50)
- Connects to: Power Tap and Input/Output connectors on the Holley EFI HEMI Main Harness
- SRV Connector: Pre-wired, plugs directly into the factory Short Runner Valve actuator
- Part Number: 558-132
FAQ
What does the 558-132 harness control?
It provides plug-and-play control and tuning of the Gen III HEMI's factory Variable Valve Timing (VVT) solenoid.
Which ECUs work with this harness?
Only the Terminator X and Terminator X Max ECUs support this harness.
Does this harness also support the Short Runner Valve?
Yes, it includes a pre-wired connector that plugs into the factory SRV actuator on stock intake manifolds.
What software version do I need?
You'll need Terminator X Firmware and Software V2 Build 50 (V2.0.50) or later.

