Split SecondSKU: 101-0219
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Sale price$329.00 USD

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Genuine SplitSecond AIC1-V4H supplemental fuel injector controller with EV6 (USCAR) connectors for use in 4 cylinder applications. This product is designed for close course racing and may never be used on public roads.

The AIC1-V4H is a laptop programmable additional injector controller. It is programmed with the Split Second R4 engine management software included on CD or available for download here. It controls six high impedance injectors over the complete vacuum region and under high boost as well.

When connected to true tach signal of the engine, the additional injector can be set to pulse at the ignition rate of the engine. This insures even distribution of fuel to all cylinders.

The AIC1-V4H is generally used with forced induction engines consisting of a turbocharger or supercharger. The AIC1-V4H gives the user a convenient way to set the fuel mixture for proper air/fuel ratio in the boost region. The approach of running additional injectors is well suited for late model applications with ECUs that have very tight control over fuel mixture. The fuel system can operate completely stock in the vacuum region and the AIC1 can provide the additional fuel required in boost.

The AIC1-V4H comes pre-wired with EV6 (USCAR) connectors. The R4 software is included on CD with this unit.

(RS232 PROGRAMMING WIRE NOT INCLUDED FROM SplitSecond) but is available here

Actual Product Weight: .95 lbs

Input Voltage: 12v DC

Programming Connection Type:  RS232 (Cable not included but available here)

Injector Connector Type: US CAR (EV6)

Number of Injector Connectors: 4

Software: R4 - (available here)

Wire Colors:

  • Yellow/Black - Tachometer Signal
  • Red - Positive 12v
  • Black - Negative 12v
  • Green - Map Sensor Signal


  • Ford Falcon 2014 to 2016
  • Ford Focus Rs 2016 to 2020
  • Ford Focus St 2013 to 2020
  • Ford Mustang 2015 to 2022
  • Ford Territory 2014 to 2016

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