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FST302000 - FAST Multiport Retro-Fit EZ-EFI? Kit

This product may require vehicle validation(s) for proper fitment. Please contact us to confirm correct vehicle fitment and usage.



The EZ-EFI® Multiport Retro-Fit kit is offered to bring all the benefits of FAST’s™ award winning EZ-EFI® system to existing factory or aftermarket equipped multi-port fuel injected engine – including GM’s TPI engines, Fords 5.0L engines, and others. The kit includes:
•Self tuning ECU
•Wideband oxygen sensor (with fitting and plug)
•Handheld user interface
•Tach adapter
•Multi-Port wiring harness

The wiring harness is completely pre-wired and labeled for a simple installation. It includes connectors for early style GM sensors (coolant temp, air temp, TPS, MAP and IAC) such as those found on a GM Tuned Port engine. All of these sensors are available from FAST™ individually or in kit form. FAST™ also offers a Ford style TPS that is directly compatible with the harness. Or the harness can be modified to accept any 0-5V TPS. The rest of the sensors need to be GM style parts. Wiring adapters are available from FAST™ to accommodate a later style GM TPS (round, 3 pin connector) or IAC (in-line, 4 pin connector). Also available are a remote mounted IAC kit and an adapter for installing an early GM IAC on a Ford throttle body.

The harness is wired for eight traditional “Minitimer” style injectors. Injector adapters or connector kits are available from FAST™ to adapt the harness to newer “USCAR” style injectors. The EZ-EFI® system must be used with high impedance injectors. A wide range of high impedance injectors are available from FAST™.

The EZ-EFI® system must be used with a vacuum referenced fuel pressure regulator. Returnless fuel systems can not be used. FAST™ offers an adjustable regulator that is ideally suited for use with EZ-EFI®. Various fuel system kits are also available. One in particular was designed specifically for the original EZ-EFI® throttle body system. It includes, among other things, the FAST™ fuel pressure regulator, a fuel pump and a fuel pressure gauge. Also included is a fuel pump relay harness that is plug-n-play with the Multi-Port EZ-EFI® wiring harness.

Related part numbers available from FAST™:

307053* Sensor Kit – GM (CTS, ATS, MAP, GM TPS)
307049* Sensor Kit – Ford (CTS, ATS, MAP, Ford TPS)

307003* Coolant Temp Sensor
307004* Air Temp Sensor

307005* Throttle Position Sensor – Ford
307006* Throttle Position Sensor – GM TPI
307028 Throttle Position Sensor – GM LT1/LS1
308022 TPS Adapter Harness – Early to Late GM

307007* Manifold pressure sensor – GM 1 Bar

307014* Idle Air Control Motor – GM TPI
307015 Idle Air Control Motor – GM LT1
307059 Idle Air Control Motor – GM LS1
307016* Remote IAC Valve Adapter w/ Filter (includes 307014)
307022 IAC Housing - Adapts Ford to GM (use with 307014)
308023 IAC Adapter Harness – Early to Late GM

170600-8 USCAR Injector Connector Kit
170604-8 Injector adapter – USCAR injector to Minitimer Connector

307030 30-70 PSI Adjustable Fuel Pressure Regulator

307503 EZ-EFI® Fuel System Kit

* These sensors are directly compatible with the Multi-Port EZ-EFI® wiring harness without adapters, modifications, etc.

Application List



  • 302000
  • 302000
  • 036584201656
  • Fast
  • New

Shipping Information

  • Item Requires Shipping
  • 6.0 lbs.
  • W11.7500” x H4.7500” x L14.5000”

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