- Engines & Components
- Engine - Assembled / Ready-to-Run
- Blueprint Pro Series GM LS 427ci 625HP
GM LS Performance with Chevy Big Block Power
Blueprint Pro Series Engines are dyno tested (dyno sheet included) and have a 30-Month/50,000-Mile Warranty. Your Blueprint Engine was tested with the components and specifications listed below. If you prefer to install different part(s), your engine may not produce the horsepower recorded on your dyno sheet.
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Retrofit Engines
Here's all you need to install a 427 cubic inch beast into your ride: new GM block; new Blueprint cylinder heads; forged crank, pistons, and rods; performance hydraulic roller camshaft, lifters, and roller rockers; oil pan.
Upgrade Engine
Swap your 1998-2010 Gen 3 or 4 engine for a 625HP 427 cubic inch powerhouse! This engine is specifically designed to replace existing LS engines. Assembled with new GM block and new Blueprint cylinder heads, plus forged crank, pistons, and rods. The engine also includes a performance hydraulic roller camshaft & lifters with upgraded roller rockers.