GM LS Compatible 427 c.i. Pro Series Engine - 585 Horsepower - Base Dressed - Holley Terminator X EFI System
GM LS Compatible 427 c.i. Pro Series Engine - 585 Horsepower - Base Dressed - Holley Terminator X EFI System
GM LS Compatible 427 c.i. Pro Series Engine - 585 Horsepower - Base Dressed - Holley Terminator X EFI System
GM LS Compatible 427 c.i. Pro Series Engine - 585 Horsepower - Base Dressed - Holley Terminator X EFI System
GM LS Compatible 427 c.i. Pro Series Engine - 585 Horsepower - Base Dressed - Holley Terminator X EFI System
GM LS Compatible 427 c.i. Pro Series Engine - 585 Horsepower - Base Dressed - Holley Terminator X EFI System

GM LS Compatible 427 c.i. Pro Series Engine - 585 Horsepower - Base Dressed - Holley Terminator X EFI System

SKU: PSLS42781CTF

GM LS Compatible 427 c.i. Pro Series Engine - 585 Horsepower - Base Dressed - Holley Terminator X EFI System

SKU: PSLS42781CTF

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: Holley Terminator X Max - Gen IV Complete ECU/Harness EFI System

Fuel Recommendation: 91+ Octane

Regular price $14,599.00
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Overview:

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.

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:

  • 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

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.
  • This engine requires a non-weighted flex plate/flywheel.
  • 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.

Your BluePrint engine was dyno tested with the parts and specifications listed below.  If you prefer to install a different part, your engine may not produce the horsepower recorded on your dyno sheet.

Part Number: PSLS42781CTF

Fuel Delivery Type: MPFI

Spark Plug: AC Delco 41-985

Spark Plug Gap: .040"

Harmonic Balancer: Non-Weighted

Flexplate/Flywheel: Non-Weighted

Stall Converter: 2200+

Intake Manifold: BluePrint Engines cast aluminum intake

Fuel Recommendation: 91+ Octane

Firing Order: 1,8,7,2,6,5,4,3

Recommended Oil Filter: BPPB160

Recommended Break in Oil: BPP710

Recommended Oil: BPP10W30

Notes: Not for EGR. Universal fit oil pan. Also includes sensors, coil packs and wiring harness, and a new ECM with our custom tune installed, drive by wire throttle body and matching throttle pedal.

Header Partners: 
Click here for our Header Partners and recommendations.

Click here to download a copy of the Installation Guide that came with your BluePrint engine.

BETTER THAN THE REST.

At BluePrint Engines, customer satisfaction is our highest priority. Every engine is built using high-quality components, with each rotating assembly balanced to within two grams of specification. Before shipment, every crate engine is dyno tested and certified to ensure it is ready to deliver the horsepower and torque you expect.

To stand behind that level of quality, BluePrint Engines offers industry-leading warranty coverage, providing confidence and peace of mind whether the engine is installed by an individual or a professional installer. Our standard warranty is fully transferable, adding long-term value and reassurance for our customers.

Warranty Coverage Details:

  • BluePrint Engines (including Builder Series)- Standard Warranty 30 months or 50,000 miles (parts and labor)*
  • BluePrint Engines Extended Warranty- 48 months or unlimited miles (parts and labor)*
  • Race / Motorsports Engines -No warranty
  • Marine Engines- 12 months (parts and labor)
  • Short Blocks-12 months (parts only)
  • Bare Blocks- 6-Month Unaltered
  • International Sales- Warranty coverage is handled by the in-country distributor

*Applies to eligible engine part numbers beginning with “B” or “P.” Warranty coverage is subject to terms and conditions. Proper installation and maintenance are required.

Please refer to full warranty documentation for complete details click here.

IT ALL COMES DOWN TO RESULTS.

We make sure we hit our target horsepower and proper torque with every crate engine. We use an advanced computerized balancer 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.

BRAGGING RIGHTS INCLUDED!

A comprehensive, dyno-generated printout showing these critical specs will accompany your delivered engine. 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 dyno results!

This engine will be dyno tested before it ships to you at no additional charge (others charge $500)!

RECOMMENDED PRODUCTS:
BluePrint Engines 10w30 Engine Oil - 1 Quart
$10.95
BluePrint Engines Crate Engine Break-In Oil — 1 Quart
$11.99
TrueBlue Performance Octane Boost
BluePrint Engines TrueBlue Performance Octane Booster
$34.99
BluePrint Engines TrueBlue UltraCool Antifreeze Coolant CONCENTRATE
$24.99
BluePrint Engines TrueBlue Power Steering Fluid
$9.99
BluePrint Engines TrueBlue Transmission Fluid UNIVERSAL ATF/MTF
$10.99
Gen IV LS and 2009+ Gen III Hemi Compatible Oil Filter
$16.99
EFI Fuel Pump and Plumbing Kit BPP5267 - For Fuel injected engines
$499.99
BluePrint Engines EFI In-Tank Retrofit Fuel Pump - 450 LPH - Return Style
$749.99
EFI Billet Aluminum Fuel Pressure Bypass Regulator - 40-75 PSI and -10AN ORB - Black
$159.99
Liquid Filled Fuel Pressure Gauge - 0-100 PSI
$19.99
Muscle car swap LS and Hemi Universal Air Intake Kit
$159.99
GM LSX Compatible Starter – Delco Style - OEM Finish
$189.99
168-Tooth Steel Flex Plate - 1-Piece Rear Main Seal - OEM LS 1-Piece Balance - 4L60E/4L70E - GM LS Compatible
$189.99
168-Tooth Nodular Iron Flywheel - 6-Bolt Crank - 11" or 12" Clutch - GM LS Compatible
$349.99
GM LS Compatible Water Neck – 45°. For 2.25 DIA LS thermostats with 2.45 overall height
$39.99
BluePrint Parts – GM LS2 Compatible Water Neck – Straight. For 2.25 DIA LS thermostats with 2.45 overall height
$39.99
GM LS Compatible Front Accessory Drive - Full Serpentine with Alternator | AC | Power Steering | Water Pump | Brackets and Bolts
from $2,599.95
GM LS Compatible Front Accessory Drive - Full Serpentine with Alternator | Power Steering | Water Pump | Brackets and Bolts
from $2,399.95
GM LS Compatible Front Accessory Drive - Full Serpentine with Alternator | AC | Water Pump | Brackets and Bolts
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8.65mm Classic BluePrint Blue- Assembled Spark Plug Wire Set - 180° Boots - GM LS Compatible
$79.99