LS 427CI 625HP Performance Crate Engine

Take your build to the next level with the LS 427CI 625HP Performance Crate Engine, a powerful and reliable solution engineered for street performance, restomods, muscle cars, hot rods, and custom vehicle projects. Built on a proven GM LS3 small-bore aluminum block with a longer-stroke rotating assembly, this engine delivers an impressive combination of horsepower, torque, and durability while maintaining the lightweight advantages of the LS platform.

Every engine is assembled using premium performance components to provide dependable power and long-term reliability. At its core is a seasoned GM 6-bolt main aluminum block paired with a fully forged rotating assembly designed to withstand demanding street and occasional track use. A custom-ground hydraulic roller camshaft works with high-flow LS3/L92 aluminum cylinder heads and upgraded performance rocker arms to maximize airflow, throttle response, and power throughout the RPM range.

To simplify installation, the engine is equipped with a muscle car oil pan that fits a wide range of popular LS swap applications. Whether you’re replacing an aging drivetrain or building a high-performance project from the ground up, this crate engine offers the performance and versatility enthusiasts demand.

Key Features

• 427 cubic-inch (7.0L) LS-based performance crate engine
• Produces approximately 625 horsepower
• Lightweight seasoned GM LS3 6-bolt main aluminum engine block
• Fully forged crankshaft, connecting rods, and pistons for exceptional strength
• Custom hydraulic roller camshaft for improved power and drivability
• High-flow LS3/L92 aluminum cylinder heads
• Upgraded performance rocker arms
• Muscle car oil pan compatible with most LS swap applications
• Excellent choice for street, restomod, pro-touring, and custom performance vehicles
• Professionally assembled using premium-quality components

We also offer complete installation support, including properly matched motor mounts, swap headers, serpentine drive systems, engine management solutions, and transmission packages to help make your LS conversion as straightforward as possible.