BluePrint Engines PSLS42781CTF LS 427/585HP Pro, Base Dressed

#227PSLS42781CTF

BluePrint Engines PSLS42781CTF LS 427/585HP Pro, Base Dressed

BluePrint LS 427 delivers 585 horsepower and 520 ft.-lbs. of torque
Holley Terminator X Max EFI
High-strength LSX-style cast iron block, forged crankshaft, and forged pistons

Level of Dress:

1) Base Dressed

2) Deluxe Dressed / Polished 2) Deluxe Dressed / Black

$15,099.00

/each

Factory Shipped

Quantity

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Product Summary

Deluxe Crate Engine Crate Engine Type, Oil Pan Included

BluePrint LS 427 delivers 585 horsepower and 520 ft.-lbs. of torque
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
Swap-ready package includes LS swap oil pan, drive-by-wire throttle body, gas pedal, water pump, injectors and fuel rail kit, coil packs, valve covers, and timing cover

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Key Specs

Crate Engine Type	Deluxe Crate Engine
Compression Ratio	11.0:1
Engine Displacement	427 cu. in.
Camshaft Type	Hydraulic Roller Tappet
Cylinder Head Material	Aluminum

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BluePrint Engines PSLS42781CTF Details

This powerhouse of an engine setup is built to deliver serious performance, boasting an impressive 585 horsepower and 520 ft. lbs. of torque. At its core is a BluePrint Engines high-strength cast iron LSX-style block, paired with forged internals including a crank and pistons for maximum durability under pressure. The 11:1 compression ratio ensures efficient combustion and power delivery, while the LS3 aluminum heads and hydraulic roller cam for enhanced airflow and responsiveness. Feeding this beast is a cast aluminum LS3 intake manifold, matched with high-performance injectors and a fuel rail kit. The drive-by-wire throttle body offers modern precision, and the LS swap oil pan, water pump, and gas pedal round out the essentials for seamless integration. Tying it all together is the Holley Terminator X Max system, providing advanced engine management and tuning capabilities. This setup isn’t just built—it’s engineered to dominate.

BluePrint LS 427 delivers 585 horsepower and 520 ft.-lbs. of torque
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
Swap-ready package includes LS swap oil pan, drive-by-wire throttle body, gas pedal, water pump, injectors and fuel rail kit, coil packs, valve covers, and timing cover

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:

New 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
Water Pump - BPPLS126WP
Injectors and Fuel Rail Kit
Spark Plugs & Wiring
Harmonic Balancer
Timing Cover
Valve Covers
Coil Packs
Gas Pedal

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 WARNING:

Can expose you to lead, a carcinogen and reproductive toxicant. See www.P65Warnings.ca.gov

CARB warning

BluePrint Engines PSLS42781CTF Specifications

KEY SPECS
MFG. Part #	PSLS42781CTF
Brand	BluePrint Engines
Crate Engine Type	Deluxe Crate Engine
Compression Ratio	11.0:1
Engine Displacement	427 cu. in.
Camshaft Type	Hydraulic Roller Tappet
Cylinder Head Material	Aluminum
Piston Material	Forged Aluminum
Crankshaft Material	Forged Steel
Carburetor Included	No
Intake Manifold Included	Yes
Distributor Included	No
Connecting Rod Material	Forged Steel
Valve Covers Included	Yes
Cylinder Heads Included	Yes
Throttle Body Included	Yes
Timing Cover Included	Yes
Oil Pan Included	Yes
Water Pump Included	Yes
Harmonic Balancer Included	Yes
Flexplate Included	No
Flywheel Included	Yes
Air Cleaner Included	No
Spark Plugs Included	Yes
Spark Plug Wires Included	Yes
Computer Included	Yes
Wiring Harness Included	No

GENERAL
Torque	520 ft./lbs.
Horsepower	585 horsepower
Combustion Chamber Volume	69cc
Camshaft Duration (.050 in)	239° intake / 255° exhaust
Camshaft Lift (in)	.624 intake / .624 exhaust
Sold in Quantity	Kit

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