Ls3 525hp engine

Description

Rebuilt LS3 525HP Engine with Transmission Wiring Harness & ECM – Complete Plug-and-Play GM Power

Bring your vehicle to life with the legendary GM LS3 525HP 6.2L V8 engine, now available as a fully rebuilt performance package complete with transmission wiring harness and ECM (Engine Control Module). Designed for reliability, precision, and pure horsepower, this engine setup delivers factory-rated 525 horsepower and 486 lb-ft of torque — all rebuilt and upgraded for long-term durability and unmatched performance.

Perfect for street performance, classic restorations, or custom projects, our rebuilt LS3 engine is meticulously inspected, machined, and assembled by expert technicians using top-tier components. This engine package includes everything you need for a straightforward installation and reliable startup.

Complete LS3 Power Package Includes:

• Rebuilt LS3 6.2L V8 Engine (525HP / 486 lb-ft Torque)

• Transmission Wiring Harness – Pre-configured for quick, plug-and-play connection

• ECM (Engine Control Module) – Professionally tuned for optimal performance

• All major gaskets, seals, and sensors replaced or upgraded

• Balanced rotating assembly for smooth and efficient operation

Performance & Reliability

Every LS3 rebuild goes through a rigorous process to ensure OEM or better specifications. From the high-flow aluminum cylinder heads to the forged pistons and rods, every detail is precision-engineered for maximum performance and longevity. The ECM is calibrated to ensure smooth throttle response, stable idling, and enhanced fuel efficiency.

The transmission wiring harness ensures seamless communication between the ECM and your drivetrain, making installation easier and faster. Whether you’re upgrading your classic Camaro, Corvette, GTO, Chevelle, or custom hot rod, this LS3 powertrain delivers a perfect balance of brute strength and modern reliability.

Technical Specifications:

• Engine Type: GM LS3 6.2L V8 (Rebuilt)

• Horsepower: 525 HP

• Torque: 486 lb-ft

• Fuel System: Electronic Fuel Injection (EFI)

• Block Material: Aluminum

• Heads: Aluminum High-Flow Design

• ECM: Pre-programmed GM-style control module

• Harness: Complete plug-and-play transmission wiring harness

Why Choose Our LS3 525HP Engine Package?

• Turnkey Solution: Comes ready with ECM and harness for simplified installation.

• Quality Assurance: Each engine is tested and verified for compression, oil pressure, and performance output.

• Durability: Built using high-performance parts for street and track reliability.

• Expert Craftsmanship: Rebuilt by specialists with years of LS engine experience.

• Nationwide Availability: We ship anywhere in the USA with professional packaging and fast delivery.

Perfect For:

• LS swaps and performance upgrades

• Restomod and muscle car builds

• Custom hot rods and street performance cars

• Track or high-performance daily drivers