Bring your LS3 engine build back to life with the Proflow Warlord LS3 OEM-Style Aluminium Engine Block - a purpose-designed replacement for applications where sourcing a brand-new original GM block is no longer a viable option.

Manufactured to replicate original LS3 OEM specifications, this block provides a factory-style foundation for engine rebuilds, restorations and performance projects where maintaining the original LS3 architecture is essential. Designed around OEM-style dimensions and factory configuration, it offers a practical alternative to sourcing and rebuilding a used or worn factory block.

Featuring a 4.065-inch bore, 9.240-inch deck height and steel six-bolt main caps, the Proflow Warlord combines familiar LS3 dimensions with a new aftermarket casting, providing a fresh starting point for your next engine build.

Whether you're rebuilding a tired original engine, restoring a vehicle to factory-style specification or putting together a reliable LS-based combination, the Proflow Warlord LS3 block delivers an OEM-style replacement solution without relying on an increasingly difficult-to-source new factory block.

Key Features

• OEM-style LS3 aluminium engine block
• Designed to replicate original LS3 specifications
• New aftermarket replacement for unavailable new genuine OEM blocks
• 4.065-inch cylinder bore
• 9.240-inch deck height
• Steel six-bolt main caps
• Standard LS3-style engine architecture
• Ideal for engine rebuilds, restorations and performance applications

The ideal solution for builders seeking a fresh LS3 block with OEM-style dimensions and configuration.

Note: This is an aftermarket Proflow replacement block, not a genuine GM factory casting. Confirm machining requirements, component compatibility and final clearances with your engine machinist before assembly.