Eagle SBC 4340 Forged Crank 4.125 Stroke — Small Block Chevy

SKU: BBPG_440041256000
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Sale price$929.99
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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 Eagle

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

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High-Strength 4.125 Stroke Forged Crank for SBC

Maximize your Small Block Chevy's displacement with this premium Eagle 4340 Forged Steel Crankshaft. Engineered for high-output engines, this crankshaft features a 4.125-inch stroke, providing the extra leverage needed to build serious torque. Constructed from 4340 forged steel, it is designed to withstand the high cylinder pressures found in performance racing applications.

Technical Specifications

  • Material: 4340 Forged Steel
  • Stroke: 4.125 inches
  • Balance: Internal balance
  • Seal: 2-piece rear main seal
  • Fitment: Small Block Chevy

The 4340 forging process ensures that this crankshaft offers superior fatigue resistance and durability compared to standard cast or even lower-grade steel cranks. The internal balance design is critical for high-RPM stability, minimizing internal stress on the engine block and bearings. Its compatibility with 2-piece rear main seal blocks makes it a versatile choice for a wide range of SBC engine builds, from high-performance street machines to dedicated drag cars. By choosing this forged component, you are investing in the longevity and reliability of your engine's rotating assembly. Experience the difference in quality and performance with parts sourced from GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

About Eagle

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

Watch in action

High-Strength 4.125 Stroke Forged Crank for SBC

Maximize your Small Block Chevy's displacement with this premium Eagle 4340 Forged Steel Crankshaft. Engineered for high-output engines, this crankshaft features a 4.125-inch stroke, providing the extra leverage needed to build serious torque. Constructed from 4340 forged steel, it is designed to withstand the high cylinder pressures found in performance racing applications.

Technical Specifications

  • Material: 4340 Forged Steel
  • Stroke: 4.125 inches
  • Balance: Internal balance
  • Seal: 2-piece rear main seal
  • Fitment: Small Block Chevy

The 4340 forging process ensures that this crankshaft offers superior fatigue resistance and durability compared to standard cast or even lower-grade steel cranks. The internal balance design is critical for high-RPM stability, minimizing internal stress on the engine block and bearings. Its compatibility with 2-piece rear main seal blocks makes it a versatile choice for a wide range of SBC engine builds, from high-performance street machines to dedicated drag cars. By choosing this forged component, you are investing in the longevity and reliability of your engine's rotating assembly. Experience the difference in quality and performance with parts sourced from GGCRACING.

Product Details

Product Description

About Eagle

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

Watch in action

High-Strength 4.125 Stroke Forged Crank for SBC

Maximize your Small Block Chevy's displacement with this premium Eagle 4340 Forged Steel Crankshaft. Engineered for high-output engines, this crankshaft features a 4.125-inch stroke, providing the extra leverage needed to build serious torque. Constructed from 4340 forged steel, it is designed to withstand the high cylinder pressures found in performance racing applications.

Technical Specifications

  • Material: 4340 Forged Steel
  • Stroke: 4.125 inches
  • Balance: Internal balance
  • Seal: 2-piece rear main seal
  • Fitment: Small Block Chevy

The 4340 forging process ensures that this crankshaft offers superior fatigue resistance and durability compared to standard cast or even lower-grade steel cranks. The internal balance design is critical for high-RPM stability, minimizing internal stress on the engine block and bearings. Its compatibility with 2-piece rear main seal blocks makes it a versatile choice for a wide range of SBC engine builds, from high-performance street machines to dedicated drag cars. By choosing this forged component, you are investing in the longevity and reliability of your engine's rotating assembly. Experience the difference in quality and performance with parts sourced from GGCRACING.

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