BluePrint Engines BLS4278KT56 LS 427/585HP with T56, EFI, Nat.

#227BLS4278KT56

BluePrint Engines BLS4278KT56 LS 427/585HP with T56, EFI, Nat.

BluePrint LS 427 delivers 585 horsepower and 520 ft.-lbs. of torque
Holley Terminator X Max EFI system
Forged crankshaft, forged pistons, aluminum heads, and hydraulic roller cam support a durable high-performance street build

Accessory Drive Finish:

Natural

Transmission Type:

$26,399.00

/each

Factory Shipped

Quantity

Need Help? Call to Order

Add to a list

Select an engine to verify Fitment

Select Engine

Product Summary

Connect and Cruise Crate Engine Type, Oil Pan Included

BluePrint LS 427 delivers 585 horsepower and 520 ft.-lbs. of torque
Holley Terminator X Max EFI system
Forged crankshaft, forged pistons, aluminum heads, and hydraulic roller cam support a durable high-performance street build
Natural front accessory drive

See more details

Key Specs

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

See more specs

Need To Know

Made to Order

This custom item will ship when completed

Truck Shipment

Truck shipments must be pre-paid with a credit card, certified check or money order

Need help?

855.313.9176

View the Help Center

Quick and Easy Returns

Return Policy

BluePrint Engines BLS4278KT56 Details

This BluePrint Builder Series LS 427 c.i. engine and T56 manual transmission package is a high-output modern small block setup built for serious street performance with advanced EFI control and the engagement of a six-speed manual. Delivering 585 horsepower and 520 ft.-lbs. of torque, it combines forged internals, BluePrint aluminum heads, a hydraulic roller cam, and the Holley Terminator X Max EFI system with a natural front accessory drive and a complete T56 transmission package for a powerful, responsive, swap-ready combination.

BluePrint LS 427 delivers 585 horsepower and 520 ft.-lbs. of torque
Holley Terminator X Max EFI system
Forged crankshaft, forged pistons, aluminum heads, and hydraulic roller cam support a durable high-performance street build
Natural front accessory drive
Complete T56 six-speed transmission package includes dual-disc clutch, steel bellhousing, billet flywheel, starter, and double-overdrive gearing

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
4.0665" 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:

BluePrint Engines Cast Aluminum Intake Manifold
LS Swap Oil Pan - Windage Tray - Pick Up Screen
BluePrint Engines Fuel Injectors and Rail
DBW Throttle Body - BPP12191019
Throttle Pedal, and Sensors
Spark Plugs & Wires
Harmonic Balancer
Coil Packs
Natural Front Accessory Drive
LT1 Style 150-amp Alternator
LT1 Style Water Pump
Type II Power Steering Pump w/ Reservoir
Compact Style Air Conditioning Compressor

Assembled with Complete T56 Six Speed Transmission Package:

Includes the following:
McLeod Super Steel Pro Dual Disk Clutch
Steel Bell Housing
Billet Flywheel
Engine Guard
Starter

First Gear Ratio: 2.66:1

Second Gear Ratio: 1.78:1

Third Gear Ratio: 1.30:1

Fourth Gear Ratio: 1.00:1

Fifth Gear Ratio: 0.80:1

Sixth Gear Ratio: 0.63:1

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

WARNING:

Cancer and Reproductive Harm – www.P65Warnings.ca.gov

CARB warning

BluePrint Engines BLS4278KT56 Specifications

KEY SPECS
MFG. Part #	BLS4278KT56
Brand	BluePrint Engines
Crate Engine Type	Connect and Cruise
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	Yes

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

Ratings & Reviews

Be the first to write a review.

Questions & Answers

Be the first to ask a question.