Hawks Motorsports proudly offers the BluePrint Engines BPP12110351 GM LS Compatible Bare Block, an uncompromising foundation engineered for extreme horsepower LS engine builds. Featuring a 9.240-inch standard deck height, 4.000-inch semi-finished bore, SIAM (siamesed) cylinder bores, and OEM-style steel billet 6-bolt main caps, this premium cast iron block delivers the strength and rigidity required for naturally aspirated, turbocharged, supercharged, and nitrous-assisted applications.

Manufactured from high-strength EN-GJL-250 cast iron, the BPP12110351 incorporates reinforced bulkheads, thick cylinder walls, precision CNC machining, and a priority main oiling system with center crossover to provide exceptional crankshaft stability and reliable lubrication under extreme engine loads. The billet steel six-bolt main cap design significantly increases bottom-end strength, making this block an outstanding choice for competition engines producing four-digit horsepower.

With a 4.000-inch rough bore, 4.185-inch maximum finished bore, and support for a 4.250-inch stroke crankshaft, this block is capable of supporting engine combinations up to 468 cubic inches. It accepts OEM-style LS timing covers, oil pumps, oil pans, rear covers, and valley covers, providing excellent compatibility with factory and aftermarket LS components.

Whether you're assembling a 376, 408, 427, or 454+ cubic inch LS stroker, the BPP12110351 provides the durability, machining precision, and race-proven design serious builders demand.

Key Features:

• Part Number: BPP12110351
• GM LS Compatible Bare Engine Block
• High-Strength EN-GJL-250 Cast Iron Construction
• Standard 9.240" Deck Height
• 4.000" Semi-Finished Cylinder Bore
• SIAM (Siamesed) Cylinder Design
• OEM-Style Steel Billet 6-Bolt Main Caps
• Priority Main Oiling System with Center Crossover
• Reinforced Main Webbing
• Thick .600" Deck Surface
• CNC Precision Machined
• Supports Up To 4.185" Finished Bore
• Supports Up To 4.250" Stroke
• Maximum Displacement: 468 Cubic Inches
• Standard 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
• Dura-Bond CH-25 Cam Bearings
• 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
• Marine Applications
• Custom LS Engine Swaps

Always 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.
• Designed for standard LS-compatible rotating assemblies.
• Accepts OEM-style timing covers, oil pumps, oil pans, rear covers, and valley covers.
• Billet steel 6-bolt main caps provide maximum bottom-end strength for extreme horsepower applications.
• Compatible with crankshaft strokes up to 4.250 inches.
• AFM/DOD lifter systems are not supported.
• Professional machining, blueprinting, and engine assembly are strongly recommended.