The LS Apex 4340 Forged Crank is a high-performance aftermarket crankshaft designed for serious engine builders and performance enthusiasts. Crafted from 4340 forged steel, this crankshaft is built to handle the demands of high-output engines, offering superior strength, durability, and precision. Whether you're building a street machine or a race engine, the Apex 4340 crankshaft delivers the performance you need for maximum power and reliability.

Technical Specifications

• Material: 4340 Forged Steel
  • Known for its excellent strength-to-weight ratio, 4340 forged steel provides maximum durability and resistance to torsional stress, making it ideal for high-performance and high-horsepower applications.
• Stroke: 4.000 Inches
  • A 4.000-inch stroke increases engine displacement, enhancing torque output and overall engine performance, especially for high-revving and turbocharged setups.
• Crank Pin Size: 2.100 Inches
  • The 2.100-inch pin size offers compatibility with a wide range of connecting rods and builds, ensuring flexibility for custom engine builds.
• Weight: 55 lbs (approx.)
  • The crankshaft is engineered to balance strength with weight, ensuring it’s robust yet not excessively heavy, reducing the load on engine components.

Performance Benefits

• High-Strength Construction: The 4340 forged steel construction ensures that the crankshaft can handle extreme horsepower and torque levels, providing peace of mind during high-stress engine operation.
• Increased Displacement: The 4.000-inch stroke increases your engine's displacement, offering improved low-end torque and better overall power delivery, which is critical for performance builds and racing applications.
• Precision Engineering: Each crankshaft is precision-machined to ensure exact tolerances, contributing to smoother engine operation and longevity, even under extreme conditions.

Design Features

• Forged Construction: Forged from 4340 steel, this crankshaft is significantly stronger than cast alternatives, making it ideal for performance builds that demand reliability and endurance.
• Balanced Design: Designed for optimal balancing, the crankshaft minimizes vibrations during engine operation, improving overall performance and engine lifespan.
• Compatibility: Directly compatible with most LS-based engine blocks, making it a great choice for custom builds, performance upgrades, and race engines.

Installation & Maintenance

• Installation: Professional installation is recommended for this high-performance crankshaft. It requires precise alignment and balancing during assembly to ensure optimal performance and reliability.
• Maintenance: Regular oil changes and proper lubrication are crucial for maintaining the longevity of the crankshaft and engine components. Regular inspection for wear and tear is recommended in high-performance applications.

Compliance

• Engineered for Performance: Meets or exceeds OEM specifications for strength, fitment, and durability, ensuring high performance and long-lasting reliability for performance engines.
• Suitable for Racing: Built to withstand the rigorous demands of racing applications, including drag racing, road racing, and other high-performance motorsport environments.