Hawks Motorsports proudly offers the BluePrint Engines PSLS42750CTF GM LS Compatible 427 C.I. Pro Series Engine, a premium LS performance crate engine package designed for enthusiasts who want maximum airflow, custom styling, and serious naturally aspirated LS performance. Producing approximately 605 horsepower and 565 lb-ft of torque, this Base Dressed Pro Series engine combines BluePrint’s high-strength LS architecture with a BPE fabricated aluminum intake manifold for improved performance potential and a clean custom-engine appearance.

The PSLS42750CTF is built around a BluePrint high-strength LSX-style cast iron block and features LS3 aluminum cylinder heads, forged rotating assembly, hydraulic roller camshaft, and premium internal components designed for demanding street, strip, and custom swap applications. The 427 cubic inch displacement delivers increased torque and horsepower while maintaining the compact packaging advantages of the GM LS platform.

This engine includes the BluePrint Motorsports fabricated aluminum intake manifold and comes as a Base Dressed package without ECU or wiring harness, allowing builders to select their preferred engine management system, throttle body, and tuning platform. The combination of LS compatibility, big cubic inch performance, and custom intake configuration makes this engine ideal for Camaro, Corvette, Chevelle, C10, restomod, and Pro Touring builds.

Key Features:

• Part Number: PSLS42750CTF
• Manufacturer: BluePrint Engines
• GM LS Compatible Pro Series Engine
• 427 Cubic Inch Displacement
• 605 Horsepower
• 565 lb-ft Torque
• Base Dressed Configuration
• BPE Fabricated Aluminum Intake Manifold Included
• No ECU / Wiring Harness Included
• BluePrint High Strength LSX-Style Cast Iron Block
• LS3 Aluminum Cylinder Heads
• Forged Steel Crankshaft
• Forged Connecting Rods
• Forged Performance Pistons
• Hydraulic Roller Camshaft
• Internally Balanced Rotating Assembly
• 11.0:1 Compression Ratio
• High Flow Intake Configuration
• LS3-Style Cylinder Heads
• LS Swap Oil Pan Included
• Harmonic Balancer Included
• Valve Covers Included
• Timing Cover Included
• Designed for Custom LS Swap Applications

Engine Specifications:

General:

• Manufacturer: BluePrint Engines
• Part Number: PSLS42750CTF
• Engine Family: GM LS Compatible
• Series: Pro Series
• Configuration: Base Dressed
• Displacement: 427 C.I.
• Horsepower: 605 HP
• Torque: 565 lb-ft
• Compression Ratio: 11.0:1
• Fuel System: EFI Ready
• Intake Manifold: BPE Fabricated Aluminum Intake
• ECU/Harness: Not Included
• Fuel Recommendation: 91+ Octane

Block Specifications:

• BluePrint High Strength LSX-Style Cast Iron Block
• Bore: 4.125"
• Stroke: 4.000"
• 6-Bolt Main Design
• Priority Main Oiling System
• Increased Deck Thickness
• Reinforced Main Webbing
• Extended Cylinder Skirt Design
• Improved Water Jacket Design
• 1-Piece Rear Main Seal
• LS3 Front & Rear Cover Compatible

Rotating Assembly:

• Forged Steel Crankshaft
• Stroke: 4.000"
• Forged Connecting Rods
• Rod Length: 6.125"
• Forged Performance Pistons
• Internally Balanced Rotating Assembly
• High Strength Rod Fasteners

Cylinder Heads:

• BluePrint LS3 Aluminum Cylinder Heads
• Chamber Size: 69cc
• Intake Valve: 2.165"
• Exhaust Valve: 1.590"
• Intake Runner: 259cc
• Exhaust Runner: 102cc

Camshaft Specifications:

• Hydraulic Roller Camshaft
• Three-Bolt Cam Design
• Intake Lift: .624"
• Exhaust Lift: .624"
• Duration @ .050:
  • Intake: 239°
  • Exhaust: 255°
• Lobe Separation Angle: 114°

Intake System:

BPE Fabricated Aluminum Intake Manifold

Features:

• Custom fabricated aluminum construction
• High-flow intake design
• Improved airflow capability for performance applications
• Lightweight performance upgrade
• Ideal for custom LS swap and naturally aspirated builds
• Provides a premium show-quality engine appearance

Included Components:

Includes:

• LS3 Aluminum Cylinder Heads
• BPE Fabricated Aluminum Intake Manifold
• Fuel Rails
• Fuel Injectors
• Valve Covers
• Harmonic Balancer
• Timing Cover
• LS Swap Oil Pan
• Oil Pump
• Pickup Tube

Does not include:

• ECU
• Wiring Harness
• Throttle Body
• Engine Management System
• Exhaust Components
• Starter
• Alternator

Fitment Applications:

Compatible with custom GM LS-powered builds including:

• Chevrolet Camaro
• Chevrolet Corvette
• Chevrolet Chevelle
• Chevrolet Nova
• Chevrolet C10
• Chevrolet Silverado
• Pontiac Firebird
• Pontiac GTO
• Pontiac G8
• Chevrolet SS
• Street Rods
• Restomod Builds
• Pro Touring Vehicles
• LS Swap Applications
• Custom Muscle Cars
• High-Performance Street Builds

Verify vehicle fitment, transmission compatibility, ECU requirements, accessory clearance, fuel system requirements, and exhaust compatibility before installation.

Installation Notes:

• Requires customer-supplied ECU and wiring harness.
• Requires compatible LS throttle body and fuel system.
• Designed for custom LS swap applications.
• Requires compatible LS transmission setup.
• Verify flexplate/flywheel compatibility before installation.
• Professional tuning recommended.
• Recommended fuel: 91+ octane.
• Verify hood clearance due to fabricated intake height.
• Check accessory drive and exhaust clearance before installation.