Blueprint Engines
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BluePrint Builder Series LS427/585HP Standard Edition EFI Crate Engine and T56 Transmission Combos BLS4278KT56 427 c.i. LS Iron Block Edition, Fuel Injected, Manual w/ Polished Pulley Kit
BluePrint Builder Series LS427/585HP Standard Edition EFI Crate Engine and T56 Transmission Combos BLS4278KT56 427 c.i. LS Iron Block Edition, Fuel Injected, Manual w/ Polished Pulley Kit
A$57,648.21
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Description
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 21:18:08
Features
Vehicle Compatibility and Return Conditions.
This item was designed and engineered in the USA for US domestic vehicles. OBD tools, ECUs, dongles, programmers, and tuners may have limited compatibility with vehicles outside the USA due to regional differences in emission standards and system configurations. Some features and functionality may vary depending on the vehicle and location.
Some electronic tuning devices and programmers require activation, registration, or pairing with a specific vehicle’s VIN (Vehicle Identification Number). Once activated or paired, these devices may become permanently associated with that vehicle, restricting or preventing their use on another vehicle, resticting our ability to offer returns or exchanges.
Please review the product details and images to ensure it meets your needs. For clarification or assistance, feel free to contact a StreetFX agent. Note: Returns are not accepted for special order or tuning products unless the unit is deemed faulty.
Images are supplied by the manufacturer and may be generic. While all efforts are made to provide accurate pictures, there may be differences in the actual product, such as colour, quantity, version, or included components. Please carefully review the description and specifications for details on inclusions or any variations. Some items may be sold individually or in sets, and images may occasionally depict additional products or quantities not included in your purchase. For assistance or clarification, please contact customer support.
Specifications
Reference Information
| Reference Data (Provide these details to our support team) | |
|---|---|
| Brand Name/s | Blueprint Engines |
| StreetFX SKU | mllBLS4278KT56 |
| SFX Item ID | 5183016 |
| Accounting SKU | mll-BLS4278KT56 |
| Manufacturer SKU | BLS4278KT56 |
| Manufacturer UPC | 00887753986481 |
| Alternative References | BLS4278KT56, MLL-BLS4278KT56 |
Engine 427 c.i. LS Builder Series Iron Block Standard Edition, Fuel Injected, T56 Manual Transmission w/ Polished Pulley Kit
The BluePrint Builder Series LS427/585HP Standard Edition EFI crate engine and T56 transmission combos take the guesswork out of matching up an engine and transmission for your ride. Featuring a fuel injected Chevy LS small block-compatible 427 (c.i.d.) engine that produces 585 hp, this standard edition builder series includes a polished (or black) pulley kit and T56 manual transmission. The BluePrint aluminum cylinder heads help produce a nice 11.0:1 compression ratio, with assistance from the hydraulic roller camshaft, forged pistons, and forged steel crankshaft. Altogether, this assembly produces 520 lbs.-ft. of torque. When you need or want a new LS powertrain for your ride, go with the authority in crate engines and their BluePrint Builder Series LS427/585HP Standard Edition EFI crate engine and T56 trans combos.
Other product features, items, and specifications include:
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
• One-piece rear main seal
• Priority main oiling
• 4.0695 in. Bore
• 6-bolt main
Rotating Assembly:
• Forged steel crankshaft
• 4.125 in. stroke
• Forged 6.125 in. connecting rods
• Forged pistons
• Internally balanced front and rear
Cylinder Heads:
• BluePrint aluminum cylinder heads
• 69cc Chamber
• 2.165 in. Intake /1.590 in. Exhaust valves
• 259cc Intake /102cc Exhaust runners
Cam Specs:
• Hydraulic Roller
• 0.624 Intake / 0.624 Exhaust lift
• 239 Intake / 255 Exhaust duration
• @.050-114 degree lobe separation
Ignition Timing:
• ECM supplied with calibration
• Not capable of transmission control
• Transmission Controller Required
Other Components:
• Front accessory drive with water pump, alternator, power steering pump, and A/C compressor
• Drive-by-Wire throttle body
• LS3 cast aluminum intake manifold
• LS swap oil pan
• Water pump
• Engine harness and ECU Kit
• Injectors and fuel rail kit
• Spark plugs and wiring
• Harmonic balancer
• Timing cover
• Valve covers
• Coil packs
• Gas pedal
Important Notes: This engine requires a non-weighted flex plate/flywheel. Recommended Fuel: 91 Octane. The front accessory drive on this engine fits many vehicles, however it is the customer responsibility to accurately measure and confirm fitment. Note this is a low-profile design, but things such as power steering hoses, alternator wiring, and additional fittings/fabrication may be required on some vehicles. BluePrint Engines recommends a 2200+ RPM stall converter. 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. The LS controller package is for engine control only. Does not contain any transmission or body control. The ECU comes with calibration that is optimal for our engine, however, please note that vehicle parameters such as gearing, tire size, vehicle weight, air intake, headers, etc. may necessitate additional tuning once installed into your specific vehicle. The ECU is unlocked for further refinement at your local dyno shop if required.
BluePrint Engines recommends their air intake kit (BPPLS01013) to ensure correct MAF calculations and Dyno calibration are maintained with the provided ECU/tuning.
| Product Attributes | |
|---|---|
| Brand | BluePrint Engines |
| Manufacturer's Part Number | BLS4278KT56 |
| Part Type | Engine and Transmission Combos |
| Product Line | BluePrint Builder Series LS427/585HP Standard Edition EFI Crate Engine and T56 Transmission Combos |
| UPC | 00887753986481 |
| Crate Engine Family | Chevy LS |
| Engine Assembly Style | Long block |
| Assembled | Yes |
| Intake Manifold Included | Yes |
| Carburetor Included | No |
| Throttle Body Included | Yes |
| Cylinder Heads Included | Yes |
| Cylinder Head Material | Cast aluminum |
| Distributor Included | No |
| Oil Pan Included | Yes |
| Valve Covers Included | Yes |
| Timing Cover Included | Yes |
| Water Pump Included | Yes |
| Harmonic Balancer Included | Yes |
| Spark Plugs Included | Yes |
| Spark Plug Wires Included | Yes |
| Flexplate Included | No |
| Flywheel Included | Yes |
| Transmission Controller Included | No |
| Torque Converter Included | No |
| Wiring Harness Included | Yes |
| Computer Included | Yes |
| Reluctor Wheel Tooth Quantity | 58 |
| Quantity | Sold as a kit. |
| Special Attention | Includes Holley Terminator X Max Gen IV complete EFI engine management system, harness, starter, drive-by-wire pedal and throttle body. Polished front accessory drive system includes water pump, alternator, power steering pump, A/C compressor and all belts and pulleys. |
Compatibility
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