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-10% HP ECU and Harness Kit, GM TPI and Holley Stealth Ram

This HP EFI ECU and Harness Kit is designed to make upgrade from the factory GM fuel injection on GM TPI applications hassle-free. The harness is designed to run to all of the factory sensor and injector locations, but they go the extra step and include the O2 sensor (your choice of Bosch or NTK), MAP sensor, air and coolant temperature sensors that you will need for the job. This same ECU/Harness kit is the one that Holley specifies for their Stealth Ram intakes, so it includes the throttle position sensor that works with both applications. Even the IAC connection is there to let you set up a smooth idle. Not only is ECU main power included but it also has the ignition timing pickup adapter. If you're not converting from TPI and need to replace the mechanical fuel pump, there is even a blockoff plate for that. It's all there!  And if you are trying to decide between the HP and Dominator ECU we help make that choice easier by offering to upgrade the ECU in this kit.

Free ECU Setup--Seriously?

For a limited time when you buy one of our Holley HP and ECU Kits we will ship it pre-configured for your basic setup at no additional charge. That means as soon as you get everything installed this should give you the ability to crank the engine--much like the Setup Wizard does on systems like the Sniper or Terminator. Note that this does not include tuning services or setup of things like nitrous control, boost control, transbrake setup, etc. However, whenever you purchase an EFI System from EFI System Pro you get our Level 3 Platinum EFI System Support at no extra charge. We're going to be there to help you be successful with your EFI system installation!

Boost ControlIntegrated (Utilizing at least two I/O Ports.) Control based on time, gear, speend, and/or manual selection. Requires 557-200 Boost Control Solenoid Valve.
Fueling StrategySpeed Density, Alpha-N, or Combination
Internal Datalogging4 GB
Nitrous ControlIntegrated 4 Stage (Utilizing at least two I/O ports.) Progressive control utilizing 554-111 solenoid driver.
User Configurable I/O4 programmable PWM outputs (2 high and 2 low) and 4 fully configurable inputs.
Water-Methanol ControlIntegrated (Utilizing at least two I/O Ports.) Recommend Holley Water-Methanol pump, nozzles, and install kit.
Harness TypeMain Harness, Power Harness, 8-Injector Harness, Small Cap HEI Ignition Harness
TypeAir Temperature, Coolant Temperature, MAP, Wideband O2 (Bosch),
Also IncludedO2 Sensor Bung, Mechanical Fuel Pump Block-Off Plate
ApplicationGM TPI (OE)
Emission Code3
Unit of SaleKit

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HP ECU and Harness Kit, GM TPI and Holley Stealth Ram

  • Views: 20423
  • Brand: Holley EFI
  • Product Code: 550-601 | 550-601N
  • Availability: In Stock
  • $2,803.00
  • $2,521.95

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