Hawks Motorsports proudly offers the BluePrint Engines BPP12110358 GM LS Compatible Bare Block, a premium cast iron foundation engineered for serious LS engine builds requiring exceptional strength, precision machining, and the flexibility to build everything from high-performance street engines to extreme forced-induction race combinations. Featuring a 9.240-inch standard deck height, 4.000-inch semi-finished bore, SIAM (siamesed) cylinder bores, and OEM-style steel billet 4-bolt main caps, this block delivers outstanding rigidity while maintaining compatibility with OEM and aftermarket LS components.

Manufactured from EN-GJL-250 high-strength cast iron, the BPP12110358 incorporates reinforced bulkheads, a priority main oiling system with center crossover, thick cylinder walls, and a .600-inch deck surface to withstand extreme cylinder pressures. Precision CNC machining ensures accurate deck surfaces, lifter bores, and line-honed main bearing bores for reliable engine assembly and long-term durability.

The block supports a maximum 4.185-inch finished bore, 4.250-inch maximum stroke, and engine combinations up to 468 cubic inches, making it an excellent choice for naturally aspirated, turbocharged, supercharged, and nitrous-assisted LS builds. It accepts OEM-style timing covers, oil pumps, oil pans, rear covers, and valley covers, simplifying installation while allowing extensive aftermarket customization.

Whether you're building a durable 408, powerful 427, or massive 468 cubic inch LS stroker, the BPP12110358 provides the race-proven strength and machining quality professional engine builders demand.

Key Features:

• Part Number: BPP12110358
• GM LS Compatible Bare Engine Block
• EN-GJL-250 High-Strength Cast Iron Construction
• Standard 9.240" Deck Height
• 4.000" 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 exceptional bottom-end strength while maintaining OEM-style architecture.
• Supports crankshaft strokes up to 4.250 inches.
• AFM/DOD lifter systems are not compatible.
• Professional machining, blueprinting, and engine assembly are strongly recommended.