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Holley EFI

Holley EFI GEN III HEMI VVT and SRV Harness

Use with Terminator X or X Max Systems Only

Part # 558-132
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2009+ Gen III Hemi engines rolled off the showroom floor with Variable Valve Timing (VVT). Now, both Terminator X and Terminator X Max ECUs will allow you to control and tune the VVT with the use of the plug and play VVT harness. The fun does not stop there though! If you are using a stock intake manifold that came from the factory with the Short Runner Valve, we also have a new plug and play sub harness that will allow you to utilize the SRV actuator and capitalize on its low RPM torque benefits.


  • Plug and play with the factory Gen III HEMI VVT sub-harness, and any Holley EFI HEMI Main Harness connecting to the Power Tap and Input/Output connectors
  • Provides control of VVT solenoid under the intake manifold
  • SRV (Short runner valve) connector pre-wired into the sub harness allowing you to simply plug into the factory SRV actuator in the intake manifold

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 TypeHarness
Part Number558-132
Requires Terminator X Firmware and Software V2 Build 50 (Terminator X V2.0.50 Software)

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