Hawks Motorsports proudly offers the BluePrint Engines BPP12110357 GM LS Compatible Bare Block, the ideal foundation for serious high-performance LS engine builds. Engineered for maximum strength and durability, this premium cast iron block features a 9.240-inch standard deck height, 4.125-inch semi-finished bore, SIAM (siamesed) cylinder bores, and ductile cast iron 4-bolt main caps to support naturally aspirated, nitrous, turbocharged, and supercharged engine combinations.

Manufactured from high-strength EN-GJL-250 cast iron, the BPP12110357 incorporates reinforced bulkheads, thick cylinder walls, and a priority main oiling system for exceptional durability under extreme horsepower applications. The block is capable of supporting up to a 4.185-inch finished bore, 4.250-inch stroke, and engine combinations producing up to 468 cubic inches, making it an excellent choice for street performance, drag racing, Pro Touring, marine, and custom LS swap builds.

Each BluePrint Engines block is precision CNC machined to ensure excellent deck flatness, accurate main bore alignment, and proper lifter bore geometry. The block accepts standard LS timing covers, oil pumps, oil pans, rear covers, and valley covers, allowing builders to utilize a wide variety of OEM and aftermarket components while creating a reliable, high-horsepower engine package.

Whether you're assembling a naturally aspirated 427, a 454 stroker, or a boosted 468 cubic inch LS monster, the BPP12110357 delivers the strength, reliability, and machining quality demanded by today's professional engine builders.

Key Features:

• Part Number: BPP12110357
• GM LS Compatible Bare Engine Block
• High-Strength EN-GJL-250 Cast Iron Construction
• Standard 9.240" Deck Height
• 4.125" Semi-Finished Cylinder Bore
• SIAM (Siamesed) Cylinder Design
• Ductile Cast Iron 4-Bolt Main Caps
• Priority Main Oiling System
• Reinforced Main Webbing
• Thick Deck Surface
• CNC Precision Machined
• Supports Up To 4.185" Finished Bore
• Supports Up To 4.250" Stroke
• Maximum Displacement Approximately 468 Cubic Inches
• Standard LS Camshaft Location
• Accepts Standard LS Oil Pump
• Accepts Standard LS Timing Cover
• Accepts Standard LS Oil Pan
• Accepts Standard LS Valley Cover
• Accepts Standard LS Rear Cover
• Passenger Side Starter Configuration
• Designed for Naturally Aspirated, Turbocharged, Supercharged, and Nitrous Applications
• Manufactured in the USA

Fitment Applications:

Compatible with custom GM LS-based engine builds, including:

• Chevrolet Camaro
• Chevrolet Corvette
• Chevrolet Chevelle
• Chevrolet Nova
• Chevrolet Silverado
• Chevrolet C10
• Chevrolet El Camino
• Chevrolet Caprice
• Pontiac GTO
• Pontiac Firebird
• Pontiac G8
• Chevrolet SS
• Street Rods
• Pro Touring Builds
• Drag Racing Vehicles
• Off-Road Applications
• Marine Applications
• Custom LS Engine Swaps

Always verify rotating assembly, oil pan, cylinder head, and accessory compatibility before engine assembly.

Installation Notes:

• Semi-finished cylinders require final boring and honing.
• Professional machining and blueprinting are recommended before assembly.
• Designed for standard LS architecture components.
• Compatible with OEM and most aftermarket LS timing covers, oil pans, rear covers, and oil pumps.
• AFM/DOD lifter systems are not supported.
• Verify all bearing clearances, piston-to-wall clearance, and rotating assembly fitment before final assembly.
• Intended for experienced engine builders or professional machine shops.