Overview:

The BluePrint Engines GM LS Compatible 376ci is a masterclass in high-performance durability, engineered to deliver a staggering 700 horsepower and 640 lb-ft of torque with unwavering reliability. At the heart of this beast lies the Magnuson TVS 2650 Supercharger, providing instant, efficient boost and relentless power across the RPM range. The Holley Terminator X Max Gen IV ECU and harness system ensures precise engine management, while the advanced EFI system—complete with high-flow fuel injectors and rail—maintains optimal combustion under extreme conditions. Every supporting component, from the oil pan and coil packs to the spark plugs, wires, water pump, and harmonic balancer, is built to withstand the rigors of high-output operation. Paired with the bulletproof 4L80E automatic transmission, this setup offers smooth, torque-rich shifts that handle the power with ease. Finished with the Holley Natural Front pulley kit, this configuration is not only robust and performance-driven—it’s a statement of engineering excellence.

Description:

• Horsepower & Torque: 700 Horsepower / 640 ft. lbs. Torque
• Compression Ratio: 9.5:1
• BluePrint Engines LS3 Aluminum Heads
• BluePrint Engines Hydraulic Roller Cam
  
• BluePrint Engines Forged Pistons
• BluePrint Engines Forged Crankshaft
  

Block:

• BluePrint Engines High Strength Cast Iron 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
• 3.622" Stroke
• 6.125" Forged Connecting Rods w/ 150,000 PSI Bolts
• Forged Pistons
• Internally Balanced Front and Rear

Cylinder Heads:

• BluePrint Aluminum Cylinder Heads - PS8015
• 70cc Chamber
• 2.165" Intake / 1.590" Exhaust Valves
• 259cc Intake / 102cc Exhaust Runners

Cam Specs:

• Hydraulic Roller Cam
• .612 Intake / .585 Exhaust Lift
• 225 Intake / 238 Exhaust Duration
• @.050-113 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:

• LS Swap Oil Pan - Windage Tray - Pick Up Screen
• BluePrint Engines Fuel Injectors and Rail
• DBW Throttle Body - BPP12191019
  
• Magnuson TVS 2650 Supercharger
• Throttle Pedal, and Sensors
  
• Spark Plugs & Wires
• Harmonic Balancer
  
• Coil Packs
  
• Natural Front Accessory Drive:
  • 150-amp Alternator
  • LT3 Style Water Pump
  • Power Steering Pump with Attached Reservoir
  • Compact Style Air Conditioning Compressor 

Assembled with Complete Performance Built 4L80E Four Speed Automatic Transmission Package:

• 4l80E Complete Package
• Electronic Transmission Controller Included
• 3000+ Stall Torque Converter
• Flex Plate
• Starter

4L80E Gear Ratios:

• 1: 2.482
• 2: 1.482
• 3: 1.00
• 4: 0.750
• R: 2.077

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.
• BluePrint Engines Recommends Air Intake Kit BPPLS01013 to ensure correct MAF calculations and Dyno calibration are maintained with the above ECU / tuning. 
• 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.