BluePrint Engines GM LS Compatible Bare Engine Blocks BPP12110357

Name: BluePrint Engines GM LS Compatible Bare Engine Blocks
Brand: BluePrint Engines
SKU: MLL-BPP12110357
Price: 3999.99 USD
Availability: OutOfStock
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Part Number: MLL-BPP12110357

$3,999.99

BluePrint Engines GM LS Compatible Bare Engine Blocks

Engine Block LS, SIAM, 9.240 x 4.125, CAST MC, 4 HD BLT
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BluePrint Engines GM LS Compatible Bare Engine Blocks BPP12110357

MLL-BPP12110357

Not Yet Reviewed

Part Number: MLL-BPP12110357

Estimated Ship Date: Dec 17, 2026

$3,999.99

Overview

Applications

Q&A

Instructions & Calculators

Estimated Ship Date: Dec 17, 2026 Would you rather pick it up?

Overview

Brand:

BluePrint Engines

Manufacturer's Part Number:

BPP12110357

Part Type:

Engines, Bare Blocks

Product Line:

BluePrint Engines GM LS Compatible Bare Engine Blocks

Summit Racing Part Number:

MLL-BPP12110357

UPC:

00887753995124

Main Journal Type:

Chevy LS

Engine Block Material:

Cast iron

Engine Block Style:

Aftermarket

Engine Block Deck Height:

Standard deck

Deck Height (in.):

9.240 in.

Cylinder Bore as Shipped:

4.114 in.

Maximum Bore Diameter (in.):

4.185

Camshaft Location:

Standard

Engine Block Weight (lbs.):

240 lbs.

Main Bolt Style:

6-bolt

Main Caps Included:

Yes

Main Cap Material:

Cast iron

Main Cap Fasteners Included:

Yes

Main Bearings Included:

Rear Main Seal Style:

1-piece

Finished Cylinder Bores:

Raised Cam Location:

Cam Bearings Included:

Freeze Plugs Included:

Remanufactured:

Quantity:

Sold individually.

Notes:

Accepts OEM style timing cover.

Special Attention:

Cylinder bore as shipped is within the range of 4.114 in. to 4.116 in. diameter. Block is set up for 4 head bolts per cylinder.

BluePrint Engines GM LS Compatible Bare Engine Blocks

Whether you're assembling a torque-rich street monster, a boosted track bruiser, or a no-compromise stroker setup, BluePrint Engines GM LS Compatible Bare Engine Blocks give you the headroom and confidence to push your LS platform far beyond stock limits. These bare engine blocks are high-strength, cast-iron, aftermarket foundations designed for high-horsepower, boosted, or stroker applications up to 519+ cubic inches. With reinforced architecture, thick cylinder walls, and precision-machined surfaces, they deliver the rigidity and reliability needed for high-horsepower, high-rpm combinations. Big inches, big power, and rock-solid dependability start right here with GM LS bare engine blocks.

Key features and options for BluePrint LS-compatible blocks include:

* Cast iron with Siamese cylinder bores for maximum strength
* Compatible with LS3 and LSX components
* Structure: Reinforced main webbing, thick cylinder walls, and 6-bolt billet main cap design on some models
* Stroke/Bore: Extended 5.75-inch cylinder skirts for longer strokes (up to 4.185-inch bore)
* Design enhancements include priority main oiling, 4-corner steam ports, and improved water jackets for better cooling
* Deck Heights: options include 9.240-inch and 9.705-inch
* Available in 4.000-inch and 4.125-inch bore options
* Cylinder Wall Thickness: 0.210-inch to 0.230-inch
* Oiling System: priority main oiling with center crossover
* Weight: approximately 240 lbs.