The BluePrint Engines GM LS Compatible 427 C.I. Pro Series Crate Engine delivers modern LS performance with the strength and reliability required for serious street, restomod, and high-performance applications. Producing an impressive 600 horsepower and 530 ft.-lbs. of torque, this Deluxe Dressed engine package combines a high-strength LSX-style block, forged internals, LS3 aluminum cylinder heads, and advanced EFI technology from the Holley Terminator X Max Gen IV EFI system.

Designed around a 427 cubic inch displacement, this Pro Series engine features an 11:1 compression ratio, forged dish pistons, a forged steel crankshaft, 6.125-inch connecting rods, and a hydraulic roller camshaft engineered for strong power throughout the RPM range. The LS3 aluminum cylinder heads provide excellent airflow, while the Holley Terminator X Max EFI system offers precise fuel control, diagnostics, and simplified tuning capability.

The Deluxe Dressed configuration includes a show-quality polished pulley kit with a complete front accessory drive system, making it an excellent choice for builders looking for both performance and appearance. The engine package includes a fabricated aluminum intake manifold, fuel rail system, drive-by-wire throttle body, EFI components, and accessories designed for a clean LS swap installation.

Whether you're upgrading a Camaro, Corvette, Chevelle, Nova, G-Body, truck, or custom LS swap project, the PSLS42751CTFK 427 C.I. Pro Series Engine provides big-block-level horsepower with modern LS compatibility and EFI reliability.

Key Features:

• 427 C.I. GM LS Compatible Pro Series Crate Engine
• 600 Horsepower / 530 ft.-lbs. Torque
• Deluxe Dressed configuration
• Polished 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
• Fabricated aluminum intake manifold
• Drive-by-wire throttle body
• Fuel rail system
• Non-weighted harmonic balancer
• Requires 91+ octane fuel
• Dyno tested by BluePrint Engines

Polished Pulley Kit Includes:

• Polished LS 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 front accessory drive design

Fitment Applications:

Designed for custom GM performance builds including:

• Chevrolet Camaro LS Swap Builds
• Chevrolet Corvette Performance Applications
• 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 Builds

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

Installation Notes:

• Holley Terminator X Max ECU is pre-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.