-10% Out Of Stock Avenger 2-BBL TBI EFI Kit, 670 CFM (Up To 275 HP)

Quick Glance

By using Holley's Avenger EFI ECU, a 2-BBL throttle body unit capable of flowing up to 670 cfm, and 75 lb per hour injectors, the Holley 550-200 Avenger 2-BBL TBI Fuel Injection Kit is an ideal solution for horsepower requirements to 275 HP with super-simple handheld programmer setup (no laptop required.) It can be used with square- or spread-bore 4-BBL intake manifolds (adapters included) or with the intake manifolds made for the Holley 2300 2-BBL intake (adapater available separately.)

Detailed Overview

If you are currently running a 2-barrel carburetor and are making up to 275 HP, Holley has made it super-easy for you to make the switch to fuel injection! Holley's 2-bbl Throttle Body Injection (TBI) Fuel Injection Kit is made to be a fast, easy, cost-effective swap from carburetion to the many benefits of fuel injection. The kit includes adapters for both spread-bore and square-bore intake manifolds, or an adapter for Holley 2300 carburetor manifolds is available separately. This is the fast lane to fuel injection for those already setup to run a 2-barrel carburetor!

If you're looking at this and wondering how difficult it is to set up a Holley 2BBL TBI Fuel Injection Kit, let us give you some reassurances. If you have the tools and knowledge to bolt a carburetor into place and connect the fuel lines, you're half way there already. You'll then have to replace the stock fuel pump and install the O2 sensor, MAP sensor, and air temperature sensor. All that remains is finding a home inside the car for the ECU, connecting the harness (most of the connections are just plug-ins), and then running the setup program. Every single part you need for the installation is included, other than a bit of fuel line and a few crimp connectors. The Holley 2-BBL TBI Fuel Injection Kit even includes the fuel pump!

Holley has made the setup program so easy you simply won't believe it. You use the Holley Handheld Controller to answer a series of really tough questions (like, "is the engine more or less than 410 cubic inches?".) See, you don't believe it. So visit the online video that shows the whole Holley Avenger setup process. It takes less than 3 minutes to completely set up the ECU and start the engine. After this, the system actually tunes itself, as do all of the Holley ECUs, while you drive.

Take a look at the installation instructions for the Holley 2-BBL TBI Fuel Injection Kit you are considering prior to making a purchase decision. This shows you a list and graphic of every single part that is included with the kit, along with a list of the tools and other components that you will need to complete the installation. Any questions? Contact us--we promise, we don't bite! We love to help new users experience the benefits of Holley Fuel Injection Kits.

Hood Clearance

The 2-BBL throttle body included in this kit is 2.060 inches tall and requires an air cleaner that is at least 3 inches tall to clear the injectors. Also, be sure to leave room for the adapter that you might use (either of the two included in the kit or the 17-47 adapter mentioned below.) You should factor at least 6 inches above the mounting surface of your carburetor flange and the hood.

Fuel Injection Kit Details

The Holley Avenger EFI Engine Management System 2-Barrel Throttle Body Injection (TBI) fuel injection kit (Part Number (550-200) flows 670 cubic feet per minute (cfm) and supports engines up to 275 horsepower. It is an all-inclusive kit that contains everything you will need to replace the carburetor on an intake manifold with a square-bore or spread-bore carburetor mount other than some fuel line. Optionally, it can be used to replace a carburetor on a Holley 2300/Motorcraft style intake manifold (use Holley TBI to 2-BBL Adapter Plate 17-47.)

After you remove the existing fuel system (carburetor, fuel pump, and fuel pressure regulator) you will start by installing the throttle body included in the kit. You then mount the MAP sensor, install the fuel pump and filter (along with the return fuel line), and oxygen sensor. At this point you're ready to locate the ECU and complete the wiring using the pre-terminated wiring harness. Complete, detailed, step-by-step instructions are included to make this a snap. Here's a quick list of the tools that are commonly used in installing the Holley Avenger 2-BBL TBI Fuel Injection Kit:

  • Standard wrench set
  • Small blade screwdriver
  • 5/32 Allen wrench
  • Medium blade screwdriver
  • #2 Phillips screwdriver
  • Digital Volt-Ohm meter
  • Drill and assorted bit sizes
  • Hole saw (2")
  • Terminal crimping tool
  • Engine tachometer
  • 10" adjustable wrench
  • Utility knife
  • Factory Service Manual for your vehicle

Several of the steps are best performed with an assistant. The installation of the boss for the wideband oxygen sensor typically requires a welder, and is a job easily completed at a local muffler shop if you do not have access to a welder. Setup is completed in minutes with the included handheld controller. Once the engine is started, it self-tunes using the feedback from the wideband oxygen sensor to precisely hit the air-fuel ratio. You've completed the installation of your Holley 2-BBL TBI Fuel Injection kit!

Not Sure? Review this product documentation before you buy!

Installation Manual
Holley 2-BBL TBI Kit

Setup and Tuning Manual
Holley ECU and Handheld

Boost ControlNo
DIS OutputsNone
Fueling StrategySpeed Density
Includes Power HarnessYes
Injector DriversFour
Internal Datalogging4GB
Knock Control Channels0
Nitrous ControlNo
Number of Cylinders4, 6, or 8 (Even Fire Only)
User Configurable I/OYes
User-Selectable MAP StorageNo
Water-Methanol ControlNo
Displays And Controllers
Auto BrightnessNo
CAN Bus CapableYes
Case/Bezel FinishBlack
Data LoggingN/A
Display TypeLCD
FunctionsInitial Setup, Monitoring
Gauge/Display Size3.5 Inch Rectangular
Internal StorageN/A
Throttle Bodies
Airflow Rate (CFM)670 CFM
Barrels (BBL)2
Gaskets IncludedYes
IAC Motor IncludedYes
Injectors IncludedYes
StyleThrottle Body Injection
TPS Sensor IncludedYes
Fuel Pressure Regulators
Pressure RangeSet
RebuildableYes (PN 512-1)
StyleIntegrated in Throttle Body
Fuel Pumps
Flow Rate (GPH)30.3 GPH
Flow Rate (LPH)115 LPH
Fuel SystemLow Pressure TBI
Fuel TypeGasoline or E85
Fuel Filters
Element MaterialPaper
Filter TypeInline
Micron FiltrationPrefilter: 20 Micron / Postfilter: 10 Micron
Mounting Bracket IncludedPrefilter: No / Postfilter: Yes
Outside DiameterPrefilter: 1.94 Inches / Postfilter: 2.17 Inches
Harness TypePower Harness, Avenger All-In-One 2BBL TBI Harness, Ignition Adapter Harness
Crank Timing
Sensor Harness IncludedNo (Ignition Adapter Only)
Type1 BAR MAP, Throttle Position (Integrated in TB); Coolant Temperature, Wideband O2 (Bosch) and Air Temperature Sensor; Oil and Fuel Pressure Sensors optional, not included
Also Included40-Amp Relay. Outputs to switch up to two electric fans and A/C WOT Shutoff. Many features of the Holley HP and Dominator ECU are accessible by adding the optional 3.5" Handheld, 553-108
ApplicationUniversal (Requires intake manifold for 2-bbl Holley 5300 carburetor or adapter there-to)
ColorCast Aluminum Throttle Body
Emission Code3
Unit of SaleKit

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Avenger 2-BBL TBI EFI Kit, 670 CFM (Up To 275 HP)

  • Views: 24353
  • Brand: Holley
  • Product Code: 550-200
  • Availability: Out Of Stock
  • $2,909.00
  • $2,617.95