Overview

BluePrint Engines GM LS Compatible Bare Engine Blocks

Whether you're assembling a torque-rich street monster, a boosted track bruiser, or a no-compromise stroker setup, BluePrint Engines GM LS Compatible Bare Engine Blocks give you the headroom and confidence to push your LS platform far beyond stock limits. These bare engine blocks are high-strength, cast-iron, aftermarket foundations designed for high-horsepower, boosted, or stroker applications up to 519+ cubic inches. With reinforced architecture, thick cylinder walls, and precision-machined surfaces, they deliver the rigidity and reliability needed for high-horsepower, high-rpm combinations. Big inches, big power, and rock-solid dependability start right here with GM LS bare engine blocks.

Key features and options for BluePrint LS-compatible blocks include:

* Cast iron with Siamese cylinder bores for maximum strength
* Compatible with LS3 and LSX components
* Structure: Reinforced main webbing, thick cylinder walls, and 6-bolt billet main cap design on some models
* Stroke/Bore: Extended 5.75-inch cylinder skirts for longer strokes (up to 4.185-inch bore)
* Design enhancements include priority main oiling, 4-corner steam ports, and improved water jackets for better cooling
* Deck Heights: options include 9.240-inch and 9.705-inch
* Available in 4.000-inch and 4.125-inch bore options
* Cylinder Wall Thickness: 0.210-inch to 0.230-inch
* Oiling System: priority main oiling with center crossover
* Weight: approximately 240 lbs.

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