SKU: PSLS42781CTFK
BluePrint Engines GM LS Compatible 427 c.i. Pro Series Engine - 585 Horsepower - Deluxe Dressed - Polished Pulley Kit - Holley Terminator X EFI System
$16,049.00
427 c.i. 585 Horsepower Deluxe Dress

Horsepower & Torque: 585 Horsepower / 520 ft. lbs. Torque

Cylinder Heads: BluePrint Engines LS3 Aluminum Cylinder Heads

Compression Ratio: 11:1

Camshaft: Hydraulic Roller Cam - .624 Intake / .624 Exhaust Lift and 239 Intake / 255 Exhaust Duration @ .050 - 114° LSA - Three Bolt Cam

Pistons: Forged

Crankshaft: Steel Crank - 4.125" Stroke and 6.125" Rods

Multi-Port Fuel Injection: BluePrint Engines Complete Engine Harness and ECU Kit

Fuel Recommendation: 91+ Octane

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Financing available at checkout with Affirm

Overview:

This powerhouse of an engine build is a testament to precision engineering and raw performance. Delivering a formidable 585 horsepower and 520 ft. lbs. of torque, it’s driven by a BluePrint Engines LSX-style high-strength cast iron block, paired with forged crank and pistons for uncompromising durability. The 11:1 compression ratio ensures optimal combustion efficiency, while LS3 aluminum heads and a hydraulic roller cam (featured twice for emphasis on valvetrain performance) bring refined airflow and aggressive cam timing. Feeding this beast is a drive-by-wire throttle body and LS3 cast aluminum intake manifold, supported by a complete injector and fuel rail kit for consistent fuel delivery. The LS swap oil pan, water pump, and gas pedal round out the essentials, while the Holley Terminator X Max ECU provides cutting-edge engine management. A polished pulley kit featuring an LS2-style water pump, 140-amp alternator, peanut-style A/C compressor, and Type II power steering pump with remote reservoir ensures accessory systems run smoothly and reliably. Altogether, this setup blends brute force with modern control, making it ideal for high-performance street applications.

Description: 

  • Horsepower & Torque: 585 Horsepower / 520 ft. lbs. Torque
  • Compression Ratio: 11:1
  • BluePrint Engines LS3 Aluminum Heads
  • BluePrint Engines Hydraulic Roller Cam
  • BluePrint Engines Forged Crank
  • BluePrint Engines Forged Pistons

Block:

  • BluePrint Engines High Strength Cast Iron (LSX Style) Block
  • Increased Deck Thickness and Strength Webbing
  • Utilizes OEM LS3 Front and Rear Covers
  • Improved Water Jacket Design
  • Extended Cylinder Skirt
  • 1-Piece Rear Main Seal
  • Priority Main Oiling
  • 4.0695" Bore
  • 6-Bolt Main

Rotating Assembly:

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

Cylinder Heads:

  • BluePrint Aluminum Cylinder Heads - PS8015
  • 69cc Chamber
  • 2.165" Intake / 1.590" Exhaust Valves
  • 259cc Intake /102cc Exhaust Runners

Cam Specs:

  • Hydraulic Roller
  • .624 Intake / .624 Exhaust Lift
  • 239 Intake / 255 Exhaust Duration
  • @.050-114 Degree Lobe Separation

Holley Terminator X Max Specific Features and Benefits:

  • Real Time Fuel Map Learning Simplifies Tuning by Dynamically Adjusting the Base Fuel Rate
  • On Board Bosch LSU 4.9 Wideband Control, Enabling Accurate AFR Readings and Closed Loop Tuning
  • Eight High Impedance Injector Drivers, Ideal for Stock LS Injectors and Holley EFI Injectors
  • Integrated 1-Bar MAP Sensor for Naturally Aspirated or Nitrous Setups, with Harness Support for External Higher Bar Sensors if needed
  • 4 Configurable Inputs (12V, Ground, 5V, Frequency) and 2 Outputs (Ground, PWM) - Ideal for Electric Fans, Boost Control Solenoids, Nitrous Control and more
  • Free PC Tuning Software via USB/CAN Interface for Full Laptop Control and Advance Setup
  • Integrated 3.5" Touchscreen Handheld with Setup Wizard, Internal Data Logging, and Real Time Gauge Displays
  • Terminator X Max ECU will Include a Base Timing Map Pre-Configured for this engine

Also Includes:

  • Drive by Wire Throttle Body - BPP12191019
  • LS3 Cast Aluminum Intake Manifold
  • LS Swap Oil Pan - BPP81074
  • Engine Harness and ECU Kit
  • Injectors and Fuel Rail Kit
  • Spark Plugs & Wiring
  • Harmonic Balancer 
  • Timing Cover
  • Valve Covers
  • Coil Packs
  • Gas Pedal
  • Polished Pulley Kit
    • LS2 Style Water Pump
    • 1- Wire 140amp Alternator
    • Peanut Style Air Conditioning Compressor
    • Type II Power Steering Pump with Remote Reservoir

Notes:

  • This Holley EFI Equipped engine has a fully calibrated ECU by BluePrint Engines. Please DO NOT follow the Holley EFI manual for the calibration of the ECU.
  • The front accessory drive on this engine fits many vehicles, however it is the customer responsibility to accurately measure and confirm fitment. Note this is a low-profile design, but things such as power steering hoses, alternator wiring, and additional fittings/fabrication may be required on some vehicles.
  • Retro fit oil pan will fit most 1955-1995 GM front engine, RWD, V8 cars.
  • Not for use in pollution-controlled vehicles or in dry sump applications.
  • BluePrint Engines Recommends Air Intake Kit BPPLS01013 to ensure correct MAF calculations and Dyno calibration are maintained with the provided ECU / tuning.

WARNING: Cancer and Reproductive Harm
Bragging Rights Included.

EVERY BLUEPRINT ENGINE ACES THE DYNO TEST

We make sure we hit our target horsepower and proper torque with every crate engine. We use an advanced computerized balancer in our in-house dyno testing rooms to get our rotating assemblies within two grams, ensuring silky smooth power over the entire RPM range. That’s precisely why our engines sound and run better than our competitors.

All specs, zero speculation: A comprehensive, dyno-generated printout showing your critical engine specs will accompany your delivered engine — every time. No more guessing or wondering what your installed engine’s real-world peak horsepower and torque ratings actually are. Any doubters in the crowd? Simply flash ‘em your exact engine’s dyno results.

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