Eagle Lightweight 4340 Forged Crankshaft 4.000 Stroke — Fits Big Block Chevy

SKU: BBPG_445640046135
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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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Eagle Lightweight 4340 Forged Crankshaft for Big Block Chevy

Experience improved engine response and durability with the Eagle Lightweight 4340 Forged Crankshaft for Big Block Chevy (BBC) engines. With a 4.000 inch stroke, this crankshaft is engineered to provide the perfect balance of strength and rotational mass reduction, allowing your engine to rev faster and perform better under load.

Technical Specifications

  • Stroke: 4.000 inches.
  • Material: 4340 Forged Steel.
  • Design: Lightweight profile for faster acceleration.
  • Balance: Internal balance design.
  • Seal Style: 1-Piece rear main seal.
  • Application: Big Block Chevy (BBC).

The lightweight design of this crankshaft reduces parasitic loss, translating into more power reaching the wheels. Forged from high-quality 4340 steel, it is more than capable of handling the high-torque demands of a Big Block Chevy. The internal balance design ensures smooth operation, reducing the need for heavy external counterweights and minimizing wear on your main bearings. Designed for the 1-piece rear main seal, this crankshaft is an excellent choice for modern BBC performance builds. Each unit is precision-machined to ensure perfect journal alignment and surface finish, providing the reliability you need for the street or the strip. Discover the best in performance engine components at 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

Eagle Lightweight 4340 Forged Crankshaft for Big Block Chevy

Experience improved engine response and durability with the Eagle Lightweight 4340 Forged Crankshaft for Big Block Chevy (BBC) engines. With a 4.000 inch stroke, this crankshaft is engineered to provide the perfect balance of strength and rotational mass reduction, allowing your engine to rev faster and perform better under load.

Technical Specifications

  • Stroke: 4.000 inches.
  • Material: 4340 Forged Steel.
  • Design: Lightweight profile for faster acceleration.
  • Balance: Internal balance design.
  • Seal Style: 1-Piece rear main seal.
  • Application: Big Block Chevy (BBC).

The lightweight design of this crankshaft reduces parasitic loss, translating into more power reaching the wheels. Forged from high-quality 4340 steel, it is more than capable of handling the high-torque demands of a Big Block Chevy. The internal balance design ensures smooth operation, reducing the need for heavy external counterweights and minimizing wear on your main bearings. Designed for the 1-piece rear main seal, this crankshaft is an excellent choice for modern BBC performance builds. Each unit is precision-machined to ensure perfect journal alignment and surface finish, providing the reliability you need for the street or the strip. Discover the best in performance engine components at 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

Eagle Lightweight 4340 Forged Crankshaft for Big Block Chevy

Experience improved engine response and durability with the Eagle Lightweight 4340 Forged Crankshaft for Big Block Chevy (BBC) engines. With a 4.000 inch stroke, this crankshaft is engineered to provide the perfect balance of strength and rotational mass reduction, allowing your engine to rev faster and perform better under load.

Technical Specifications

  • Stroke: 4.000 inches.
  • Material: 4340 Forged Steel.
  • Design: Lightweight profile for faster acceleration.
  • Balance: Internal balance design.
  • Seal Style: 1-Piece rear main seal.
  • Application: Big Block Chevy (BBC).

The lightweight design of this crankshaft reduces parasitic loss, translating into more power reaching the wheels. Forged from high-quality 4340 steel, it is more than capable of handling the high-torque demands of a Big Block Chevy. The internal balance design ensures smooth operation, reducing the need for heavy external counterweights and minimizing wear on your main bearings. Designed for the 1-piece rear main seal, this crankshaft is an excellent choice for modern BBC performance builds. Each unit is precision-machined to ensure perfect journal alignment and surface finish, providing the reliability you need for the street or the strip. Discover the best in performance engine components at GGCRACING.

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