PSLS4272CTFKB GM LS Compatible 427 ci. Cast Iron Deluxe Dressed Engine w/Black Pulley Kit [625 HP]

Name: PSLS4272CTFKB GM LS Compatible 427 ci. Cast Iron Deluxe Dressed Engine w/Black Pulley Kit [625 HP]
Brand: BLUEPRINT ENGINES
SKU: 138-PSLS4272CTFB
Price: 17688.02 USD
Availability: InStock

^$17,688⁰²

Truck Freight

Ships on 12/08/2026

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GM Plastic Intake Manifold

GM LS 427 ci. ProSeries Deluxe Dressed Engine

Includes:

Base Dressed 625 HP Engine With:
Cast Iron Block
LS3 Aluminum Heads

Black Front Accessory Drive:

Alternator
A/C Compressor
Power Steering Pump
Water Pump

Blueprint Engines PSLS4272CTFKB GM LS 427 ci. ProSeries Deluxe Dressed Engine:
- Block:
  - Cast Iron Block
  - 6-Bolt Mains
  - 4.0685 in. Bore
  - 1-Piece Rear Main Seal
- Rotating Assembly:
  - New Forged Crankshaft
  - 4.125 in. Stroke
  - Forged 6.125 in. Connecting Rods
  - Forged Pistons
  - Internally Balanced Front & Rear
- Cylinder Heads:
  - BluePrint Aluminum Cylinder Heads PS8015
  - Compression Ratio: 11:1
  - 70 cc Chambers
  - 2.165 in. Intake/1.590 in. Exhaust Valves
  - 259 cc Intake/102 cc Exhaust Runners
- Cam Specs:
  - Cam Type: Hydraulic Roller
  - .624 Intake/.624 Exhaust Lift
  - 239 Intake/255 Exhaust Duration @ .050
  - Lobe Separation (LSA) 114
- Ignition Timing:
  - ECM Supplied with Calibration
- Also Includes:
  - Drive by Wire Throttle Body
  - LS3 Intake Manifold
  - 42# Injectors and Returnless Fuel Rail
  - Harmonic Balancer
  - Valve Covers, Retro-Fit Oil Pan, and Timing Cover
  - Coil Packs
  - Spark Plugs and Wires
  - Wiring Harness
  - Gas Pedal
  - Front Accessory Drive Alternator, A/C Compressor, Power Steering, and Water Pump
Blueprint Engines PSLS4272CTFKB GM LS 427 ci. ProSeries Deluxe Dressed Engine Notes:
- Requires a non-weighted flex plate/flywheel
- Recommended Fuel: 91 Octane
- Front accessory drive on this engine fits many vehicles, however, it is the customer responsibility to accurately measure and confirm fitment
- It is a low-profile design, but things such as power steering hoses, alternator wiring, and additional fittings/fabrication may be required on some vehicles
- BluePrint Engines recommends a 2200+ RPM stall converter
- Retrofit oil pan will fit most 1955-1995 GM front engine, RWD, V8 cars
- Not for dry sump applications
- Included LS controller package is for engine control only. Does not contain any transmission or body control
- ECU comes with calibration that is optimal but vehicle parameters such as gearing, tire size, vehicle weight, air intake, headers, etc. may necessitate additional tuning once installed into a specific vehicle
- Included ECU is unlocked for further refinement at your local dyno shop if required
Emissions Note:
This part is only legal for sale and use on Uncontrolled (Non-Emissions Controlled) Vehicles or on vehicles used solely for the purposes of closed competition racing.
CLICK THIS LINK FOR IMPORTANT CARB & EPA EMISSIONS INFORMATION ABOUT THIS PART

7.0 Liter LS Power

Blueprint Engines GM LS Compatible 427 ci. ProSeries Crate Engines provide modern performance and reliability. These 427 ci. crate engines are designed and built in-house to provide options for the daily cruiser to all-out performance.

Part TypeEngine

Product LineBlueprint Engines GM LS 427 ci. ProSeries Crate Engines

BrandBLUEPRINT ENGINES

Package Height27.5

Package Width30.0

Package Length38.0

Weight610.0 PG

Part CategoryPerformance Parts

Engine TypeHigh-Performance Crate Engine

Cylinder Head MaterialAluminum

Engine Block MaterialCast Iron

Dyno TestedYes