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#227BPMS4271SBLS

BluePrint BPMS4271SBLS GM LS 427 Power Adder Short Block Engine

  • The BluePrint Motorsports Pro Series GM LS compatible 427 cubic-inch short block is built for extreme duty race and high-performance street applications, providing a rock-solid foundation for custom builds.
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$7,499.00

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Product Summary

Short Block Crate Engine Type, Internal Engine Balance

  • The BluePrint Motorsports Pro Series GM LS compatible 427 cubic-inch short block is built for extreme duty race and high-performance street applications, providing a rock-solid foundation for custom builds.
  • Featuring a forged 8-counterweight crankshaft with a 4.125-inch stroke, forged H-beam 6.125-inch connecting rods, and Mahle 2618 custom forged pistons, the fully forged rotating assembly is internally balanced for smooth, reliable operation.
  • With a 9.5:1 compression ratio designed for 70cc cylinder heads, this short block is ready for your choice of heads, cam, and accessories.
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Key Specs

Crate Engine TypeShort Block
Engine Displacement427 cu. in.
Camshaft TypeHydraulic Roller
Piston MaterialForged Aluminum
Crankshaft MaterialForged Steel
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Need To Know

Made to Order

This custom item will ship when completed

Truck Shipment

Truck shipments must be pre-paid with a credit card, certified check or money order

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BluePrint Engines BPMS4271SBLS Details

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.

  • Compression Ratio: 9.5:1 with 70cc Heads
  • BluePrint Engines Forged Crankshaft
  • Mahle 2618 Custom Forged Pistons

Description

  • Compression Ratio: 9.5:1 with 70cc Heads
  • BluePrint Engines Forged Crankshaft
  • Mahle 2618 Custom Forged Pistons

Rotating Assembly

  • Forged 8cwt Crankshaft
  • 4.125" Stroke
  • Forged H-Beam 6.125" Connecting Rods
  • Mahle Custom 2618 Forged Pistons - Dish - 22cc
  • Internally Balanced Front and Rear

Specs

  • Compression Ratio: 9.5:1 with 70cc Chamber - LSX Style 6 Bolt Studded Heads
  • Piston: Mahle 2618 Custom Forged
  • Crankshaft: 8 Counterweight Forged Crank - 4.125" Stroke and 6.125" Rods

CARB Warning

Follow EPA, CARB, and state regulations for engine changes

Emissions warning: this part is for vehicle engine changes, not direct oem engine replacements. In California, engine changes are legal when done in compliance with California bureau of automotive repairs (bar) engine change policy. For assistance, call bar referee at: (800) 622-7733. And see https://bar.Ca.Gov/consumer/smog_check_program/engine_changes. All customers must comply with federal epa mobile source enforcement memorandum no. 1a (and addendum) and all applicable state regulations when conducting engine changes. Improper installation and/or use of this part in California may subject the installer and/or owner to a $37,500 penalty per violation per vehicle, revocation of registration, loss of use on California public right of ways, and proof of correction for tampering. There are similar restrictions and penalties under federal law and laws of all states for use of this engine change part on makes or models of vehicles that render them noncompliant with applicable state and/or federal emission laws with penalties under federal law of up to approximately $45,268 per tampered vehicle and/or engine
CA Prop 65
CARB warning

BluePrint Engines BPMS4271SBLS Specifications

KEY SPECS
MFG. Part #BPMS4271SBLS
BrandBluePrint Engines
Crate Engine TypeShort Block
Engine Displacement427 cu. in.
Camshaft TypeHydraulic Roller
Piston MaterialForged Aluminum
Crankshaft MaterialForged Steel
Carburetor IncludedNo
Intake Manifold IncludedNo
Distributor IncludedNo
Connecting Rod MaterialForged Steel
Valve Covers IncludedNo
Engine BalanceInternal
Cylinder Heads IncludedNo
Rear Main Seal Style1-piece
Throttle Body IncludedNo
Timing Cover IncludedNo
Oil Pan IncludedNo
Water Pump IncludedNo
Harmonic Balancer IncludedNo
Flexplate IncludedNo
Flywheel IncludedNo
Air Cleaner IncludedNo
Spark Plugs IncludedNo
Spark Plug Wires IncludedNo
Computer IncludedNo
Wiring Harness IncludedNo
Reluctor Wheel58x
GENERAL
Bore x Stroke (in)4.069" x 4.125"
Warranty30-Month / 50,000 Mile Warranty
Camshaft IncludedYes
Sold in QuantityEach

Questions & Answers

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Fitment

  • GM LM4

  • GM LS6

  • GM LS2

  • GM LSA

  • GM LM7

  • GM LQ9

  • 6.2 Chevy LS V8

  • GM L9H

  • GM L94

  • GM LM7

  • GM LQ9

  • 6.2 Chevy LS V8

  • GM L9H

  • GM L94

  • GM LM7

  • GM LQ9

  • 6.2 Chevy LS V8

  • GM L9H

  • GM L76

  • GM LC9

  • GM LMG

  • GM LY5

  • GM LY5

  • GM LM7

  • 4.8 Chevy LS V8

  • GM LM7

  • GM LQ4

  • GM LS1

  • GM LS3

  • GM LS1

  • GM LS1

  • GM LS6

  • GM LS2

  • GM LS3

  • GM LS4

  • GM LS4

  • 4.8 Chevy LS V8

  • GM LM7

  • 4.8 Chevy LS V8

  • GM L20

  • GM LM7

  • GM LY2

  • 4.8 Chevy LS V8

  • GM LM7

  • GM LQ4

  • GM LQ4

  • GM LQ4

  • GM LQ9

  • GM LQ4

  • GM L98

  • GM LM7

  • GM LQ4

  • GM L98

  • GM LQ9

  • GM L98

  • GM LQ4

  • GM L98

  • GM LQ4

  • GM LQ4

  • GM L98

  • GM L98

  • GM LQ4

  • GM LQ4

  • GM L98

  • GM LZ1

  • GM LS3

  • GM LM4

  • GM L77

  • GM LMG

  • GM LY5

  • GM LM7

  • GM L59

  • GM LM7

  • GM LC9

  • GM LMG

  • GM LY5

  • GM LC9

  • GM LMG

  • GM LMG

  • GM LY5

  • GM LQ4

  • GM L96

  • GM LMG

  • GM LY5

  • 4.8 Chevy LS V8

  • GM L59

  • GM LM7

  • 4.8 Chevy LS V8

  • GM LMG

  • GM LY5

  • 6.2 Chevy LS V8

  • GM L9H

  • GM LC9

  • GM LMG

  • GM LZ1

  • GM L9H

  • GM LC9

  • GM LMG

  • GM LZ1

  • GM LC9

  • GM LMG

  • GM LZ1

  • GM LMG

  • GM LY5

  • GM LH6

  • GM LS2

  • GM LM4

  • GM LM4

  • GM LM4

  • 4.8 Chevy LS V8

  • GM LM7

  • GM LQ4

  • 4.8 Chevy LS V8

  • GM L33

  • GM L94

  • GM LM7

  • GM LQ4

  • 4.8 Chevy LS V8

  • GM L33

  • GM L94

  • GM LQ4

  • 4.8 Chevy LS V8

  • GM LM7

  • GM LQ4

  • 4.8 Chevy LS V8

  • GM L33

  • GM L94

  • GM LQ4

  • 4.8 Chevy LS V8

  • GM LM7

  • GM LQ4

  • 4.8 Chevy LS V8

  • GM L33

  • GM L94

  • GM LQ4

  • GM L20

  • GM L9H

  • GM LC9

  • GM LMG

  • GM LZ1

  • GM L33

  • GM L59

  • GM LM7

  • GM LQ4

  • GM LQ4

  • GM LQ4

  • GM LM7

  • GM LQ4

  • GM LQ4

  • GM LQ4

  • GM L96

  • GM LQ4

  • GM LQ4

  • GM L96

  • GM LQ4

  • GM L96

  • GM L96

  • GM LQ4

  • 4.8 Chevy LS V8

  • GM L20

  • GM LM7

  • GM LY2

  • 4.8 Chevy LS V8

  • GM L20

  • GM L94

  • GM LM7

  • GM LY2

  • GM LZ1

  • GM L94

  • GM LC9

  • GM LMG

  • GM LZ1

  • GM LM7

  • GM L59

  • GM LM7

  • GM LQ4

  • GM L96

  • GM LQ4

  • GM L96

  • GM LQ4

  • 6.2 Chevy LS V8

  • GM LH8

  • GM LH9

  • GM LH8

  • GM LH9

  • GM LS1

  • GM LS3

  • GM LS1

  • GM LS2

Customer Impersonation Script