Lunati 4340 Forged Crankshaft 4.250 Stroke — Fits Small Block Ford 351W

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SKU: DRPX_70642501LUN
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Car Wheel Size Chart

Wheel Diameter (inches) Tire Width (mm) Aspect Ratio Rim Width (inches)
14185655.5
15195606.0
16205556.5
17215507.0
18225457.5
19235408.0
20245358.5

Note: Wheel and tire sizes vary by car make and model. Always consult your vehicle’s manufacturer for exact specifications.

How to Read Tire Size

Example: 225/45R17 means:

  • 225 = Tire width in mm
  • 45 = Aspect ratio (height as % of width)
  • R17 = Rim diameter in inches

Product Details

Product Description
Part Numbers
Sizing & Fit

About Lunati

Lunati engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Lunati lineup with fast shipping and expert fitment support — order with confidence.

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High-Performance Lunati 4340 Forged Crankshaft for SBF 351W

Unlock the full potential of your Small Block Ford 351W engine with the Lunati 4340 Forged Crankshaft. Engineered for durability and precision, this crankshaft is designed to withstand the rigors of high-horsepower applications while maintaining smooth operation. Crafted from premium 4340 forged steel, it provides the structural integrity required for racing and performance street engines.

Key Features and Specifications

  • Material: High-strength 4340 Forged Steel
  • Stroke: 4.250 inches for increased displacement
  • Balance: Internal balance design
  • Seal Style: 2-Piece rear main seal
  • Application: Small Block Ford 351W
  • Precision machined for optimal rod journal clearance

This crankshaft is the perfect foundation for your stroker build, offering superior fatigue resistance compared to cast alternatives. Whether you are hitting the drag strip or building a street-strip monster, the Lunati forged crank ensures your rotating assembly stays reliable under load. The internal balance design simplifies the balancing process and reduces vibration throughout the RPM range. Experience unmatched quality and performance reliability when you choose components from GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Lunati

Lunati engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Lunati lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

High-Performance Lunati 4340 Forged Crankshaft for SBF 351W

Unlock the full potential of your Small Block Ford 351W engine with the Lunati 4340 Forged Crankshaft. Engineered for durability and precision, this crankshaft is designed to withstand the rigors of high-horsepower applications while maintaining smooth operation. Crafted from premium 4340 forged steel, it provides the structural integrity required for racing and performance street engines.

Key Features and Specifications

  • Material: High-strength 4340 Forged Steel
  • Stroke: 4.250 inches for increased displacement
  • Balance: Internal balance design
  • Seal Style: 2-Piece rear main seal
  • Application: Small Block Ford 351W
  • Precision machined for optimal rod journal clearance

This crankshaft is the perfect foundation for your stroker build, offering superior fatigue resistance compared to cast alternatives. Whether you are hitting the drag strip or building a street-strip monster, the Lunati forged crank ensures your rotating assembly stays reliable under load. The internal balance design simplifies the balancing process and reduces vibration throughout the RPM range. Experience unmatched quality and performance reliability when you choose components from GGCRACING.

Product Details

Product Description

About Lunati

Lunati engineers high-quality automotive parts and accessories trusted by enthusiasts and shops across North America. At GGCRACING we stock the full Lunati lineup with fast shipping and expert fitment support — order with confidence.

Watch in action

High-Performance Lunati 4340 Forged Crankshaft for SBF 351W

Unlock the full potential of your Small Block Ford 351W engine with the Lunati 4340 Forged Crankshaft. Engineered for durability and precision, this crankshaft is designed to withstand the rigors of high-horsepower applications while maintaining smooth operation. Crafted from premium 4340 forged steel, it provides the structural integrity required for racing and performance street engines.

Key Features and Specifications

  • Material: High-strength 4340 Forged Steel
  • Stroke: 4.250 inches for increased displacement
  • Balance: Internal balance design
  • Seal Style: 2-Piece rear main seal
  • Application: Small Block Ford 351W
  • Precision machined for optimal rod journal clearance

This crankshaft is the perfect foundation for your stroker build, offering superior fatigue resistance compared to cast alternatives. Whether you are hitting the drag strip or building a street-strip monster, the Lunati forged crank ensures your rotating assembly stays reliable under load. The internal balance design simplifies the balancing process and reduces vibration throughout the RPM range. Experience unmatched quality and performance reliability when you choose components from GGCRACING.

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