BluePrint Engines PSLS42781CTFKB LS 427 Pro, Deluxe Dressed, Blk.

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 black 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.

• BluePrint LS 427 delivers 585 horsepower and 520 ft.-lbs. of torque
• Black pulley kit
• Holley Terminator X Max EFI
• High-strength LSX-style cast iron block, forged crankshaft, and forged pistons 
• BluePrint LS3 aluminum heads, hydraulic roller cam, and cast aluminum LS3 intake manifold

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
• Black Pulley Kit
• LS2 Style Water Pump
• 1- Wire 140amp Alternator
• Peanut Style Air Conditioning Compressor
• Type II Power Steering Pump with Remote Reservoir