The BluePrint Engines GM LS Compatible 427 C.I. Pro Series Crate Engine delivers impressive LS-based performance with a complete Deluxe Dressed configuration designed for high-performance street builds, restomods, and custom LS swap applications. Producing 585 horsepower and 520 ft.-lbs. of torque, this 427 cubic inch powerhouse combines LSX-style durability with modern EFI control through the included Holley Terminator X Max Gen IV EFI system.

Built around a high-strength LSX-style cast iron block, this Pro Series engine features BluePrint LS3 aluminum cylinder heads, forged pistons, a steel crankshaft, forged connecting rods, and an aggressive hydraulic roller camshaft engineered for strong power throughout the RPM range. The 11:1 compression ratio provides excellent performance potential while maintaining compatibility with premium pump fuel.

The Deluxe Dressed package includes a complete black accessory pulley kit, fuel injection components, intake system, sensors, wiring harness, and accessories for a cleaner and more complete LS swap installation. The included Holley Terminator X Max EFI system provides advanced tuning capability, integrated data logging, and a pre-configured calibration from BluePrint Engines specifically matched to this engine combination.

Whether you're building a Camaro, Corvette, Chevelle, Nova, G-Body, truck, or custom restomod, the PSLS42781CTFKB 427 C.I. Pro Series Engine delivers big displacement LS performance with modern reliability and show-quality engine bay appearance.

Key Features:

• 427 C.I. GM LS Compatible Pro Series Crate Engine
• 585 Horsepower / 520 ft.-lbs. Torque
• Deluxe Dressed configuration
• Black accessory pulley kit
• Holley Terminator X Max Gen IV EFI system
• Complete ECU and wiring harness
• LSX-style high-strength cast iron block
• BluePrint LS3 aluminum cylinder heads
• 11:1 Compression Ratio
• Forged pistons
• 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
• Multi-port fuel injection system
• 91+ octane fuel recommended
• Dyno tested by BluePrint Engines

Black Pulley Kit Includes:

• Black-finished front accessory drive components
• Low-profile LS accessory drive design
• Alternator assembly
• A/C compressor provisions
• Power steering pump provisions
• Water pump assembly

Note: Verify accessory clearance for your specific vehicle application before installation. Front accessory drive fitment may require additional brackets, hoses, wiring adjustments, or fabrication depending on chassis configuration.

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: Actual fitment depends on engine mounts, oil pan clearance, transmission selection, accessory clearance, and drivetrain compatibility.

Installation Notes:

• Holley Terminator X Max ECU is calibrated by BluePrint Engines specifically for this 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.
• Requires compatible LS transmission, flexplate/flywheel, starter, fuel system, and drivetrain components.
• Recommended intake and air inlet components should maintain proper ECU calibration and MAF calculations.