Hawks Motorsports proudly offers the BluePrint Engines BPP12110359 GM LS Compatible Bare Block, a premium-performance foundation engineered for serious LS engine builders who demand exceptional strength, precision machining, and the ability to support extreme horsepower. Featuring a 9.240-inch standard deck height, 4.125-inch semi-finished bore, SIAM (siamesed) cylinder bores, and OEM-style steel billet 4-bolt main caps, this block is designed to handle everything from high-performance street builds to turbocharged, supercharged, nitrous-assisted, and competition racing applications.

Constructed from high-strength EN-GJL-250 cast iron, the BPP12110359 incorporates reinforced bulkheads, thick cylinder walls, a priority main oiling system with center crossover, and precision CNC machining throughout. The billet steel main caps provide significantly greater bottom-end rigidity than conventional cast caps while maintaining OEM LS architecture for outstanding compatibility with factory and aftermarket components.

Capable of supporting a 4.185-inch maximum finished bore, 4.250-inch maximum stroke, and engine combinations up to 468 cubic inches, this block provides the durability required for high-RPM naturally aspirated engines as well as four-digit horsepower boosted combinations. The block accepts OEM-style LS timing covers, oil pumps, oil pans, rear covers, and valley covers, making it an excellent foundation for custom street, drag racing, Pro Touring, road racing, marine, and off-road builds.

Whether you're assembling a 427, 454, or 468 cubic inch LS stroker, the BPP12110359 delivers the race-proven strength, machining quality, and reliability that professional engine builders expect from BluePrint Engines.

Key Features:

• Part Number: BPP12110359
• 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
• OEM-Style Steel Billet 4-Bolt Main Caps
• Priority Main Oiling System with Center Crossover
• Reinforced Main Webbing
• .600" Thick Deck Surface
• CNC Precision Machined
• Supports Up To 4.185" Finished Bore
• Supports Up To 4.250" Stroke
• Maximum Displacement: 468 Cubic Inches
• Dura-Bond CH-25 Cam Bearings
• Standard OEM LS Camshaft Location
• Accepts OEM LS Timing Cover
• Accepts OEM LS Oil Pump
• Accepts OEM LS Oil Pan
• Accepts OEM LS Rear Cover
• Accepts OEM LS Valley Cover
• Passenger Side Starter Configuration
• AFM/DOD Not Compatible
• 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
• Restomod Builds
• Pro Touring Vehicles
• Drag Racing Applications
• Road Racing Vehicles
• Off-Road Builds
• Marine Applications
• Custom LS Engine Swaps

Verify rotating assembly, cylinder head, oil pan, and accessory compatibility before final engine assembly.

Installation Notes:

• Semi-finished cylinders require final boring and honing before engine assembly.
• Compatible with OEM-style LS timing covers, oil pumps, oil pans, rear covers, and valley covers.
• Steel billet 4-bolt main caps provide superior bottom-end strength for high-performance applications.
• Supports crankshaft strokes up to 4.250 inches.
• AFM/DOD lifter systems are not compatible.
• Professional machining, blueprinting, and engine assembly are strongly recommended.