Blueprint Engines
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BluePrint Builder Series 632/815HP Blackout Reaper EFI Crate Engine and 4L80E Transmission Combos B632FKB4L8X Combo, Series, 632/815HP, Reaper, EFI, , Aluminum Heads, 10.3L/632, Chevy Big Block, Kit
BluePrint Builder Series 632/815HP Blackout Reaper EFI Crate Engine and 4L80E Transmission Combos B632FKB4L8X Combo, Series, 632/815HP, Reaper, EFI, , Aluminum Heads, 10.3L/632, Chevy Big Block, Kit
A$67,964.69
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Description
Data: v2 - Desc: v4.2 - Upd: 2026-11-08 21:18:06
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 | mllB632FKB4L8X |
| SFX Item ID | 5182840 |
| Accounting SKU | mll-B632FKB4L8X |
| Manufacturer SKU | B632FKB4L8X |
| Manufacturer UPC | 887753972552 |
| Alternative References | B632FKB4L8X, MLL-B632FKB4L8X |
Engine and Transmission Combo, Builder Series, 632/815HP, Blackout Reaper, EFI, 4L80E , Aluminum Heads, 10.3L/632, Chevy Big Block, Kit
BluePrint Builder Series 632/815HP Blackout Reaper EFI crate engine and 4L80E transmission combos take the guesswork out of matching up an engine and transmission for your ride. Featuring a fuel injected Chevy big block-compatible 632 (c.i.d.) engine that produces 815 horsepower, this Reaper edition builder series includes a black pulley kit and 4L80E automatic transmission. The aluminum BluePrint Engines cylinder heads help produce a nice 11.0:1 compression ratio, with assistance from the hydraulic roller camshaft, forged pistons, and forged crankshaft. Altogether, this assembly produces 775 lbs.-ft. of torque. When you need or want a new powertrain for your GM ride, go with the authority in crate engines and their BluePrint Builder Series 632/815HP Blackout Reaper edition EFI crate engine and 4L80E transmission combos.
Other product features, items, and specifications include:
Block:
• New BluePrint cast iron
• Bore is 4.600 in.
• Main caps are 4-bolt
• One-piece rear main seal
• Mechanical fuel pump provision
• Tall deck (approximately 0.400 in. taller and wider than OEM block)
Rotating Assembly:
• New BluePrint forged crankshaft
• Stroke – 4.750 in.
• Forged H-beam 6.635 in. connecting rods
• Forged pistons
• Internal balance
• Non-weighted harmonic balancer
Aluminum Cylinder Heads:
• BluePrint PS8012 performance models (0.300 in. raised exhaust port vs. OEM)
• Chamber – 119cc
• Valves are 2.300 in. intake and 1.880 in. exhaust
• Exhaust runners are 358cc intake and 125cc exhaust
• Builder must verify clearance of exhaust, shift linkage, steering components, etc. before ordering
Camshaft:
• Hydraulic roller
• Intake valve lift – 0.698 in.
• Exhaust valve lift – 0.698 in.
• Intake duration at 0.050 in. of lift – 272
• Exhaust duration at 0.050 in. of lift - 282
• Lobe separation angle (LSA) – 110 degrees
Ignition Timing
• Initial is 10-16 degrees (16-20 degrees for Dominator-style carburetors)
• Total is 32-34 degrees (by 2,500 rpm for Dominator-style carburetors)
• Firing order is 1-8-4-3-6-5-7-2
Automatic Transmission Package:
• Complete 4L80E package with electronic controller (lockup capability)
• Torque converter with 3,800–4,200 rpm stall
• Non-weighted flexplate
• Starter
• Gear ratios are 2.482:1 (first), 1.482:1 (second), 1.000:1 (third), 0.750:1 (fourth), 2.077:1 (reverse)
Other Components:
• Single plane aluminum intake manifold with satin finish
• Complete EFI system (1,250 cfm) with Aeromotive A1000 fuel pump
• Valve covers, oil pan, and timing cover
• Billet front accessory drive with black finish (includes alternator, A/C, power steering, water pump, pulleys, and belts)
• BPP7938 NGK BKR5E spark plugs (0.750 in. reach, 14mm thread pitch, 5/8 in. hex, 0.035 in. gap)
• Thermostat and housing
Note: Recommended fuel is 91 octane. Recommended oil is BPP710. Not designed for EGR-compatibility.
| Product Attributes | |
|---|---|
| Brand | BluePrint Engines |
| Manufacturer's Part Number | B632FKB4L8X |
| Part Type | Engine and Transmission Combos |
| Product Line | BluePrint Builder Series 632/815HP Blackout Reaper EFI Crate Engine and 4L80E Transmission Combos |
| UPC | 887753972552 |
| Crate Engine Family | Chevy Big Block |
| 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 | Yes |
| 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 | Yes |
| Flywheel Included | No |
| Transmission Controller Included | Yes |
| Torque Converter Included | Yes |
| Wiring Harness Included | Yes |
| Computer Included | Yes |
| Quantity | Sold as a kit. |
| Notes | Black front accessory drive system includes water pump, alternator, power steering pump, A/C compressor and all belts and pulleys. |
| Special Attention | This engine features 0.300 in. raised exhaust ports and 0.400 in. deck height increase over OEM. |
Compatibility
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