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BluePrint Engines Engine Long Block - BPMS4271LS

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427CI GM LS Compatible Long Block
Manufacturer: BluePrint Engines
Manufacturer part number: BPMS4271LS
$12,399.00
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BluePrint Motorsports GM LS Compatible 427 c.i. Pro Series Engine - Power Adder - Long Block

Note: BluePrint Motorsports engines are built for maximum performance and are intended for extreme duty race applications. If this engine is used in a street application our normal 30 month, 50,000-mile warranty applies, if used in sanctioned racing no warranty, expressed, or implied.

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Products specifications

Attribute name Attribute value
Recommended Spark Plug Gap .045 in.
Rear Main Seal Style 1 Piece
Firing Order 1,8,7,2,6,5,4,3
Torque 510
Horsepower 610
Crankshaft Vendor BluePrint Engines
Cylinder Head Vendor BluePrint Engines
Engine Balance Internally Balanced
Distributor Included NA
Distributor Vendor N/A
Fuel Delivery Type NA
Fuel Delivery Vendor N/A
Intake Manifold Type N/A
Intake Manifold Vendor N/A
Recommended Stall Converter NA
Spark Plug Wires Included NA
Timing Requirements NA
Air Cleaner Included No
Carb/Fuel Injection Included No
Flexplate/Flywheel Included No
Water Pump Included No
Recommended Flexplate/Flywheel Non Weighted BPP12654640 - BPPLS1611
Recommended Harmonic Balancer Non-Weighted
Cylinder Heads Included Yes
Harmonic Balancer Included Yes
Intake Manifold Included Yes
Timing Cover Included Yes
Valve Covers Included Yes
Oil Pan Included Yes-Rear Sump
Pulley Kit Included No
Quantity EA
Compression Ratio 11.0:1
Block Description BluePrint Engines High Strength Cast Iron (LSX Style) Block - 6 Bolt Main - 4.070" Bore
Rotating Assembly Forged Crank - 4.125 in. Stroke and Forged 6.125 in. Rods
Cylinder Heads LS3 Aluminum Cylinder Heads
Recommended Octane Fuel 91+ Octane
Spark Plugs Included No
Pistons Mahle 2618 Custom Forged
Recommended Spark Plug CCH9405
Cam Hydraulic Roller Cam - 0.641 Intake / 0.641 Exhaust Lift - 236 Intake /256 exhaust duration @0.050" 115.5 LSA - Three Bolt Cam
Prop 65 Y/N Flag Yes
Prop 65 - Short Label WARNING: Cancer and Reproductive Harm - www.p65warnings.ca.gov
Country of Origin US
Condition New
🚗 Compatible with
340 vehicles are compatible with this product · 1963–2026
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