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BluePrint BPMS427LS GM LS 427 Pro Series 638HP Long Block

Ships FREE!

BluePrint BPMS427LS GM LS 427 Pro Series 638HP Long Block
BluePrint Engines

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#227BPMS427LS

BluePrint BPMS427LS GM LS 427 Pro Series 638HP Long Block

  • The BluePrint Motorsports Pro Series GM LS compatible 427 cubic-inch engine produces an impressive 638 horsepower and 540 ft-lbs of torque, making it one of the most powerful naturally aspirated LS engines available.
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$13,099.00

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Product Summary

Long Block Crate Engine Type, 11.0:1 Compression Ratio

  • The BluePrint Motorsports Pro Series GM LS compatible 427 cubic-inch engine produces an impressive 638 horsepower and 540 ft-lbs of torque, making it one of the most powerful naturally aspirated LS engines available.
  • Built with a fully forged rotating assembly, Mahle 4032 custom forged pistons, and an 11:1 compression ratio, this engine is engineered for maximum performance in both race and aggressive street applications.
  • Topped with BluePrint LS3 Aluminum Heads and a high-lift hydraulic roller cam with .646-inch lift, this long block comes complete with an LS swap oil pan, harmonic balancer, valve covers, and timing cover.
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Key Specs

Crate Engine TypeLong Block
Compression Ratio11.0:1
Engine Displacement427 cu. in.
Camshaft TypeHydraulic Roller
Cylinder Head MaterialAluminum
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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 BPMS427LS 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.

  • Horsepower & Torque: 638 Horsepower / 540 ft. lbs. Torque
  • Compression Ratio: 11:1
  • BluePrint Engines LS3 Aluminum Heads
  • BluePrint Engines Hydraulic Roller Cam
  • BluePrint Engines Forged Crankshaft
  • Mahle 4032 Custom Forged Pistons

Description

  • Horsepower & Torque: 638 Horsepower / 540 ft. lbs. Torque
  • Compression Ratio: 11:1
  • BluePrint Engines LS3 Aluminum Heads
  • BluePrint Engines Hydraulic Roller Cam
  • BluePrint Engines Forged Crankshaft
  • Mahle 4032 Custom Forged Pistons

Rotating Assembly

  • Forged Crankshaft
  • 4.125" Stroke
  • Forged 6.125" Connecting Rods
  • Mahle Custom 4032 Forged Pistons
  • Internally Balanced Front and Rear

Cylinder Heads

  • BluePrint Aluminum Cylinder Heads -PS8015
  • 70cc Chamber
  • 2.165" Intake / 1.600" Exhaust Valves
  • 259cc Intake / 102cc Exhaust Runners

Cam Specs

  • Hydraulic Roller
  • .646 intake / .646 Exhaust Lift
  • 254 Intake / 266 Exhaust Duration
  • @.050-113 Degree Lobe Separation

Also Includes

  • This engine does NOT come with a Fuel Injection ECU and Wiring Harness
  • Harmonic Balancer
  • Valve Covers
  • LS Swap Oil Pan
  • Timing Cover

Specs

  • Horsepower & Torque: 638 Horsepower / 540 ft. lbs. Torque
  • Cylinder Heads: BluePrint Engines LS3 Aluminum Cylinder Heads
  • Compression Ratio: 11:1
  • Camshaft: Hydraulic Roller Cam - .646 Intake / .646 Exhaust Lift and 254 Intake / 266 Exhaust Duration @.050-113° LSA - Three Bolt Cam
  • Pistons: Mahle 4032 Custom Forged
  • Crankshaft: Forged Crank - 4.125" Stroke and 6.125" Rods
  • UPC: 00887753990976

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 BPMS427LS Specifications

KEY SPECS
MFG. Part #BPMS427LS
BrandBluePrint Engines
Crate Engine TypeLong Block
Compression Ratio11.0:1
Engine Displacement427 cu. in.
Camshaft TypeHydraulic Roller
Cylinder Head MaterialAluminum
Piston MaterialForged Aluminum
Crankshaft MaterialForged Steel
Carburetor IncludedNo
Intake Manifold IncludedNo
Distributor IncludedNo
Connecting Rod MaterialForged Steel
Valve Covers IncludedYes
Engine BalanceInternal
Cylinder Heads IncludedYes
Rear Main Seal Style1-piece
Throttle Body IncludedNo
Timing Cover IncludedYes
Oil Pan IncludedYes
Water Pump IncludedNo
Harmonic Balancer IncludedYes
Flexplate IncludedNo
Flywheel IncludedNo
Air Cleaner IncludedNo
Spark Plugs IncludedNo
Spark Plug Wires IncludedNo
Computer IncludedNo
Wiring Harness IncludedNo
Reluctor Wheel58x
GENERAL
Torque540 ft./lbs.
Horsepower638 horsepower
Combustion Chamber Volume70cc
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

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  • 6.2 Chevy LS V8

  • GM L9H

  • GM L94

  • GM LM7

  • GM LQ9

  • 6.2 Chevy LS V8

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  • GM L94

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  • 6.2 Chevy LS V8

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  • GM L20

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  • GM L98

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  • GM L98

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  • 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

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  • 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

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  • 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