LS3 6.2L Chevy V8 Engine with ECU and Wiring Harness

What This Engine Package Is

The LS3 6.2L V8 is a high-performance Chevy engine known for its balance of street-friendly drivability and serious horsepower. With the included ECU and wiring harness, this package is a complete solution for engine swaps, performance builds, or Corvette replacements. It is ready to install and run with minimal additional setup required.

Engine Overview

The LS3 is part of GM’s Gen IV small-block engine family. It features a 6.2 liter displacement, aluminum construction, and a design optimized for both power and reliability. Its compact size makes it ideal for swaps into a wide range of vehicles.

Key engine features include:

• 6.2 liter displacement or 376 cubic inches

• Aluminum block and cylinder heads

• 90-degree naturally aspirated V8 design

• High-flow intake and heads for strong performance

Performance and Power

The LS3 delivers aggressive performance with smooth throttle response and strong torque across the RPM range. It is suitable for both daily driving and performance applications.

Typical output includes:

• Approximately 430–436 horsepower

• Approximately 424–428 lb-ft of torque

ECU and Wiring Harness Included

This package includes the factory ECU and full wiring harness, making the LS3 swap-ready. The ECU provides proper engine control, ensuring optimal fuel mapping, ignition timing, and drivability. The harness simplifies installation, reduces wiring errors, and supports all engine sensors and electronics.

Valvetrain and Fuel System

The engine uses a pushrod valvetrain with two valves per cylinder and port fuel injection. This combination delivers reliable power while maintaining a simple and compact design.

Ideal Applications

This LS3 engine package is perfect for:

• Corvette or Camaro replacements

• Muscle car engine swaps

• Restomods and performance builds

• Street and track-focused vehicles

Why Choose the LS3 Package with ECU and Harness

The LS3 6.2L V8 with ECU and wiring harness offers a complete, factory-proven performance solution. It provides strong power, reliable electronics, and easy installation, making it an excellent choice for anyone looking to build a high-performance GM-powered vehicle.