Installation Time
(approx) a Day
Difficulty Level:
Light to Moderate mechanical skill required.
Installation Guides
No guide available for this part yet.
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Holley LS1/LS6 HP EFI ECU and Harness Kit
Item CC17700
Our Price
$3,099.95 kit
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$155.00 Available in AM Cash Rewards.
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Product Information
Features, Description, Q&A, Specs & Installation
Features
- GM LS1/LS6 24x Crank Sensor With Jetronic/Minitimer Bosch Type Injector Harness Connectors
- Includes NTK Oxygen Sensor
- Legal For Sale And Use On Uncontrolled Non-Emissions Controlled Vehicles
- ISO 8846, SAE J1171 & United States Coast Guard Certified For Ignition Protection & Fire Resistance
- Supports 1-5 Bar MAP Sensor
- Laptop Programmable ECU With Variety Of Base Maps
- Sealed Automotive And Marine Grade Connectors
- Supports Boost, Nitrous, Water/Meth, Individual Cylinder Control, And More
- Recommended NTK Oxygen Sensor For Leaded Or Methanol Fuels, High Exhaust Temperatures And Forced Induction
- Suitable For Stock 5.3L Engine Swaps To 3,000+ Horsepower Race Cars
- Optional Hand-Held Programmer, 5.7" Touchscreen, And Digital Gauges Available
- Fully Potted ECU For Engine Compartment Or Interior Mounting
- Industry Leading Self-Tuning Fuel Strategy
- Advanced Functionality Including Boost, Nitrous, Water/Meth Injection, Fans, Pumps, Relays Control
- Simple Plug And Play Installation With Factory Sensors
- Includes ECU, Harness, Communication Cable, Software, And NTK Wideband O2 Sensor
- Supports Accelerometer, Boost Control, CAN-BUS, Coil Per Cylinder Ignition
- Supports Dry, Multi-Stage, Progressive, And Wet Nitrous Control
- Supports E85 Fuel, EGT, Traction Control, Knock Retard, Individual Cylinder Fuel Corrections
- Jetronic / Minitimer Injector Connector
- Fuel Injectors, Fuel Pump, Fuel Pressure Regulator, Fuel Filter, Intake Manifold, And Throttle Position Sensor Not Included
- Performance Grade Product
- Fits GM LS Engines Including 4.8L, 5.3L, 5.7L, 6L, 6.2L, And 7L V8 Variants
Description
HIGH-PERFORMANCE EFI SOLUTION. The Holley EFI GM LS1/LS6 HP EFI ECU and Harness Kit delivers advanced engine management for GM LS engines, enabling precise control of fuel, ignition, and additional systems. Designed for both stock and highly modified engines, this kit supports turbocharging, nitrous, and water/methanol injection, providing versatility for a wide range of performance applications.
ROBUST BUILD QUALITY. The ECU features a fully potted design that meets ISO 8846, SAE J1171, and United States Coast Guard certifications for ignition protection and fire resistance. Automotive and marine-grade sealed connectors ensure durability and reliability in demanding environments, suitable for both engine compartment and interior mounting.
INSTALLATION SIMPLICITY. This kit offers a plug-and-play harness compatible with factory GM LS1/LS6 sensors and coils, enabling straightforward installation without complex modifications. This accessibility makes it suitable for professional tuners and experienced enthusiasts alike.
APPLICATION. This EFI kit fits GM LS engine families, covering 4.8L to 7.0L V8 variants including LS1 and LS6 configurations. It is intended for use on non-emissions controlled vehicles only.
Holley 550-602N
CA Residents: 
WARNING: Cancer and Reproductive Harm - www.P65Warnings.ca.gov
Installation & What's in the Box
Installation Info
What's in the Box
- (1) HP EFI ECU
- (1) Wiring Harness
Questions & Answers
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