-10% Avenger Stealth Ram EFI Kit, Small Block Chevy, Early to Late Heads, Polished

You’ll get some attention when you pop the hood and show an Avenger Stealth Ram™ Multi-Port EFI system! Available for traditional or Vortec headed SB Chevys. Simply utilize a laptop (or the optional 5.7” full color touch screen LCD) along with the HP’s self-tuning capabilities to make it as easy as 1, 2, 3 to get your car up and running with EFI. The tunnel ram design of the Stealth Ram™ builds power in the upper RPM while maintaining excellent mid-range torque as well.

HP Stealth Ram™ systems include: intake manifold, billet throttle body, ECU, wiring harness, fuel rails and related small parts. Fuel pump and injectors should be selected separately to fit your requirements.

Holley Avenger EFI systems are equipped with 4 programmable inputs and 4 programmable outputs that are ideal for most vehicles with a single power adder. This feature allows the user to configure the system to support a wide range of controls including boost control, progressive nitrous, water/meth injection, speed inputs, fuel pump control, AC inputs, timing retard inputs and various other uses. When selecting an ECU, users need to ensure their planned controls can be run with the 4 inputs and 4 outputs as certain combinations may use more I/Os than are available. If more I/Os are required, users should choose the Dominator VMS.

Not Sure? Review this product documentation before you buy!

Installation Manual
Holley Avenger Stealth Ram for Small Block Chevy

Installation Instructions
Holley TPI Throttle Bodies

Setup and Tuning Guide
Holley Avenger ECU / 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)1000 CFM
Barrels (BBL)2
Gaskets IncludedYes
IAC Motor IncludedYes
Injectors IncludedYes
StyleMulti-Point Fuel Injection
Throttle Bore Diameter (ea)58 mm
TPS Sensor IncludedYes
Intake Manifolds
Complete ManifoldYes
Fuel Rail IncludedYes
Manifold TypeStealth Ram
Rear Height10.25 Inches
RPM RangeIdle - 6500 RPM
Throttle Body FlangeGM TPI
Fuel Injectors
Flow Rate (Lbs / Hr)36 PPH
Fuel Pressure Regulators
Pressure Range35 psi - 65 psi
RebuildableYes (PN 512-1)
StyleMounted on Fuel Rail
Fuel Rails
Inside Diameter3/8" / -6 AN
Fuel Pumps
Flow Rate (GPH)67.3 GPH
Flow Rate (LPH)255 LPH
Fuel SystemEFI
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, MPFI Main Harness, v8 Injector Harness, Small Cap HEI Distributor Adapter Harness, Ignition Adapter Harness
Crank Timing
Sensor Harness IncludedNo (Ignition Adapter for Small Cap HEI Distributor 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 IncludedMechanical Fuel Pump Block-off Plate
ApplicationSmall Block Chevrolet, Early to Late Heads
ColorPolished Aluminum Intake Manifold and Plenum. Clear Billet Aluminum Throttle Body with Red Throttle Blades
Emission Code3
Unit of SaleKit

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Avenger Stealth Ram EFI Kit, Small Block Chevy, Early to Late Heads, Polished

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  • Brand: Holley
  • Product Code: 550-822
  • Availability: In Stock
  • $5,963.00
  • $5,365.95