FiTECH Go Street EFI 400HP BEFIT System 30003



The Game Changer has arrived from FiTech with its latest addition to the line of Go EFI Throttle Body EFI systems. FiTech recognizes that not everyone needs or has 600HP or a wild camshaft. There is a large group of enthusiasts who are happy with their ZZ4 crate engine or their ’66 Mustang’s factory engine, but still want the advantage that EFI has to deliver. Fitech has taken your needs into consideration and built an EFI designed just for that purpose.

The Go Street EFI is a ready-to-run system that strays away from the programmable features and sticks to the basic functions necessary to get the best performance and economy out of your street and mild performance engine. FiTech once again allows you to ditch that old carburetor and advance into the EFI world at the most affordable price on the planet! Leave it to the experts in affordable EFI, we are always looking for ways to save our customers money while delivering the BEST performance possible!

  • Application: Chevrolet, Pontiac, Ford, Chrysler, Dodge, Plymouth, Etc. engines making 150 HP up to 400 HP with a 4-barrel intake manifold.
  • Replacement for any 4-barrel carburetors for engines with 150 HP up to 400 HP.
  • Use the same size air cleaner you would normally use for your 4-barrel carburetor.
  • Master Kits: FiTech part number 31003, 32203, 33003, 34003, 36003, 38003

View All 30003 Master Kits
Not legal for use on pollution controlled vehicles. This system is designed to be installed into vehicles that do not require emission controls.


  • 1 BAR internal MAP sensor.
  • Suitable for up to 400hp.
  • (4) Flow matched injectors.
  • (1) Fan control & AC Input.
  • Built-in pressure regulator.
  • Attractive cast finish.

Kit Contents

  • (1) Die-cast throttle body.
  • (1) O2 bung kit.
  • (1) Hand-held controller.
  • (1) CTS sensor.
  • (1) Hand-held controller cable.
  • (1) CTS adapter.
  • (1) Windshield mount.
  • (1) Mini USB cable.
  • (1) 4+2-Pin Connector.
  • (1) Return plug.
  • (1) O2 sensor.
  • (1) Gasket kit.

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All items ship depending on availability. If you have made a purchase or are considering a purchase please understand that if you have selected any shipping method other than “Ground” , i.e. (next day air, 2nd day air, 3rd day air) your order will not arrive on time if the item is not available to ship. To be 100% certain your item will ship in the aforementioned time frame should you choose anything but “Standard Ground” please call us at 800-525-0091 to check item availability even if the item is listed as “In Stock”. If you choose any method but “Standard Ground” and haven’t contacted us to confirm availability understand your order will ship out per the method you chose at checkout when the item becomes available. If you have any further questions please call us. Thank you for your patience during this time.

Application: Chevrolet, Pontiac, Ford, Chrysler, Dodge, Plymouth, Etc. engines making 200 HP up to 600 HP with a 4-barrel intake manifold. For non boosted engines naturally aspirated applications only.



  • Self-learning technology
  • Four flow-matched 62-lb injectors
  • Supports up to 400 HP
  • EZ-tach input reads tach signal from Coil, HEI, MSD/CDI and aftermarket ignitions (no timing control)
  • Bosch 4.2 wideband O2 sensor
  • 1 BAR internal MAP sensor
  • On-board fuel pump driver
  • Annular discharge design
  • Built-in pressure regulator
  • Hand-held tuning module
  • Single fan control and AC input (Kicks up Idle)
  • Inlet fitting: 9/16 in.-24 to 6AN
  • Return fitting: 10 mm x 1.25 to 6AN
  • Note:
    • Not legal for sale or use in emission restrictive states including California
    • For non-boosted engines – Normally aspirated applications only


               30003 Kit Contents
(1) 4-Injector Throttle Body – Die Cast Finish (30003)
(1) Harness “A” (Plug-in pigtail user harness)
(1) ECU (Mounted on Throttle Body)
(1) Set of four or eight injectors pre-installed
(1) Idle Air Control (Installed on Throttle Body)
(1) Throttle Position Sensor (Mounted on Throttle Body)
(1) Coolant Sensor
(1) Handheld Controller w/billet case
(1) Wide Band O2 Sensor
(1) O2 Sensor Bung Kit
(1) Fuel Pressure Regulator (Installed in Throttle Body)
(1) Gasket Kit
(2) -06 AN Inlet/Outlet Fittings (Installed on Throttle Body
(2) Inlet/Outlet Port Plugs (Installed on Throttle Body)
(1) Data Com Cable
(1) 8 gigabyte SD Card (Installed in Controller)
(1) 3/8-NPT Reducer
(1) 10mm Port Plug
(1) Instruction Booklet


Maximum Horsepower
Power Adder Compatible
Self Tuning
Timing Control Compatible
User Tunable
Shipping Weight:
Package Height:
Package Depth:
Package Width:

Additional information

Weight 12 lbs
Dimensions 14 × 11.5 × 7.25 in
Make Model Year