LS 427 c.i. 605 HP Engine and T56 Manual Trans BLS4273KBT56
⚠ WARNING: Cancer - www.P65Warnings.ca.gov
Description
BLS4273KBT56 LS 427 c.i. 605 HP Engine and T56 Manual Transmission -Standard Edition Builder Series - Fuel Injected
*Stock may be limited please call for availability before ordering*
*Prices include shipping to a business address with a forklift or loading dock*
*Residential addresses or lift gate deliveries please call for a quote*
GM LS Compatible 427 c.i. Engine and T56 Manual Transmission - 605 Horsepower - Standard Edition Builder Series - Black Pulley Kit - Holley Terminator X EFI System
Horsepower & Torque: 605 Horsepower / 565 ft. lbs. Torque
Cylinder Heads: BluePrint Engines 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
Pistons: Forged
Crankshaft: Forged Crank – 4.125" Stroke and Forged 6.125" Rods
Fuel Injection: Holley Terminator X Max - Gen IV Complete ECU/Harness EFI System
Fuel Recommendation: 91+ Octane
Description:
- Horsepower & Torque: 605 Horsepower / 565 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
- 4.0665" 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
- 70cc Chamber
- 2.165" Intake - 1.600" Exhaust Valves
- 259cc Intake - 102cc Exhaust Runners
Cam Specs:
- Hydraulic Roller Cam
- .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:
- Front Accessory Drive with LT1 Style 150-amp Alternator, LT1 Style Water Pump, Type II Power Steering Pump with Baffled Edges, and Compact Style A/C Compressor
- LS Swap Oil Pan - Windage Tray - Pick Up Screen
- BluePrint Engines Fuel Injectors and Rail
- DBW Throttle Body - BPP12191019
- Throttle Pedal, and Sensors
- GM Plastic Intake Manifold
- Spark Plugs & Wires
- Harmonic Balancer
- Coil Packs
- Black 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
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.
- 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.
- Engine/Trans Package Ships assembled

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