The BluePrint Engines GM LS Compatible 427 C.I. Pro Series Crate Engine delivers serious LS-based horsepower with a complete Deluxe Dressed configuration built for high-performance street cars, restomods, pro touring builds, and custom LS swap applications. Producing 600 horsepower and 530 ft.-lbs. of torque, this 427 cubic inch engine combines LSX-style block strength, forged internals, LS3 aluminum cylinder heads, and advanced EFI control through the included Holley Terminator X Max Gen IV EFI system.

Designed for enthusiasts who demand both performance and appearance, this engine features a black pulley accessory kit that provides a clean, aggressive engine bay look while maintaining the reliability and functionality required for modern LS swap builds. The combination of a high-strength cast iron LSX-style block, forged pistons, forged steel crankshaft, and hydraulic roller camshaft creates a durable foundation capable of handling serious street and performance use.

The PSLS42751CTFKB features BluePrint LS3 aluminum cylinder heads, an 11:1 compression ratio, forged dish pistons, a 4.125-inch stroke steel crankshaft, and a Holley Terminator X Max EFI system with a complete ECU and harness package. The EFI system is calibrated specifically by BluePrint Engines for this engine combination, providing simplified startup, tuning capability, and reliable performance.

Whether you're building a Camaro, Corvette, Chevelle, Nova, G-Body, truck, or custom restomod, the 427 C.I. Pro Series Engine delivers big displacement power with modern LS compatibility.

Key Features:

• 427 C.I. GM LS Compatible Pro Series Crate Engine
• 600 Horsepower / 530 ft.-lbs. Torque
• Deluxe Dressed configuration
• Black accessory pulley kit
• Holley Terminator X Max Gen IV EFI system
• Complete ECU and wiring harness
• BluePrint Engines LSX-style high-strength cast iron block
• LS3 aluminum cylinder heads
• 11:1 Compression Ratio
• Forged dish pistons (22cc)
• Forged steel crankshaft
• 4.125" Stroke
• 6.125" Connecting Rods
• Hydraulic roller camshaft:
  • .624" Intake Lift
  • .624" Exhaust Lift
  • 239° Intake Duration @ .050"
  • 255° Exhaust Duration @ .050"
  • 114° LSA
• LS3 fabricated intake manifold and fuel rail system
• Drive-by-wire throttle body
• 91+ octane fuel recommended
• Dyno tested by BluePrint Engines

Black Pulley Kit Includes:

• Black-finished front accessory drive components
• LS2-style water pump
• 140-amp alternator
• Compact peanut-style A/C compressor
• Type II power steering pump with remote reservoir
• Low-profile accessory drive design

Fitment Applications:

Designed for custom GM performance applications including:

• Chevrolet Camaro LS Swap Builds
• Chevrolet Corvette Performance Builds
• Chevrolet Chevelle Restomod Projects
• Chevrolet Nova LS Conversions
• GM G-Body LS Swaps
• Chevrolet C10 & Truck LS Builds
• Street Rods
• Pro Touring Vehicles
• Custom Restomod Applications

Note: Vehicle-specific fitment requires verification of engine mounts, oil pan clearance, accessory spacing, transmission compatibility, fuel system requirements, and drivetrain components.

Installation Notes:

• Holley Terminator X Max ECU is fully calibrated by BluePrint Engines for this specific engine combination. Do not use standard Holley base calibrations.
• Retro-fit oil pan fits many 1955-1995 GM front-engine, rear-wheel-drive V8 applications.
• Not intended for pollution-controlled vehicles or dry sump applications.
• Front accessory drive is low-profile but requires clearance verification for power steering hoses, alternator wiring, and additional fittings.
• Requires compatible LS transmission, flexplate/flywheel, starter, fuel system, and drivetrain components.