Callies Magnum 4340 Forged Crankshaft 4.250 Stroke — Fits Big Block Chevy

SKU: GBTB_BBP-42B-MG
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Increase Displacement with Magnum ReliabilityTake your Big Block Chevy to ...Read More

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Sale price$3,158.00
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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

Increase Displacement with Magnum Reliability

Take your Big Block Chevy to the next level with the Callies Magnum 4340 Forged Crankshaft. Featuring a 4.250-inch stroke, this component is designed to maximize displacement and torque, providing the aggressive power delivery needed for competitive racing. Built from premium 4340 steel, the Magnum series is engineered to withstand extreme cylinder pressures and high RPM operation.

Technical Highlights

  • Material: 4340 Forged Steel
  • Stroke: 4.250 inches
  • Balance: Internal
  • Seal: 2-Piece Rear Main
  • Application: Big Block Chevy

The Magnum series represents the pinnacle of crankshaft design, featuring advanced counterweight profiles and superior surface finishes to reduce friction and oil windage. The internal balance configuration is essential for maintaining engine integrity under heavy load, while the 2-piece rear main seal compatibility ensures broad application across various BBC block generations. This crankshaft is the ideal choice for builders looking to combine increased stroke with the legendary durability of Callies engineering. Elevate your engine's performance potential with the best components available at GGCRACING.

Product Details

Product Description
Part Numbers
Sizing & Fit

Increase Displacement with Magnum Reliability

Take your Big Block Chevy to the next level with the Callies Magnum 4340 Forged Crankshaft. Featuring a 4.250-inch stroke, this component is designed to maximize displacement and torque, providing the aggressive power delivery needed for competitive racing. Built from premium 4340 steel, the Magnum series is engineered to withstand extreme cylinder pressures and high RPM operation.

Technical Highlights

  • Material: 4340 Forged Steel
  • Stroke: 4.250 inches
  • Balance: Internal
  • Seal: 2-Piece Rear Main
  • Application: Big Block Chevy

The Magnum series represents the pinnacle of crankshaft design, featuring advanced counterweight profiles and superior surface finishes to reduce friction and oil windage. The internal balance configuration is essential for maintaining engine integrity under heavy load, while the 2-piece rear main seal compatibility ensures broad application across various BBC block generations. This crankshaft is the ideal choice for builders looking to combine increased stroke with the legendary durability of Callies engineering. Elevate your engine's performance potential with the best components available at GGCRACING.

Product Details

Product Description

Increase Displacement with Magnum Reliability

Take your Big Block Chevy to the next level with the Callies Magnum 4340 Forged Crankshaft. Featuring a 4.250-inch stroke, this component is designed to maximize displacement and torque, providing the aggressive power delivery needed for competitive racing. Built from premium 4340 steel, the Magnum series is engineered to withstand extreme cylinder pressures and high RPM operation.

Technical Highlights

  • Material: 4340 Forged Steel
  • Stroke: 4.250 inches
  • Balance: Internal
  • Seal: 2-Piece Rear Main
  • Application: Big Block Chevy

The Magnum series represents the pinnacle of crankshaft design, featuring advanced counterweight profiles and superior surface finishes to reduce friction and oil windage. The internal balance configuration is essential for maintaining engine integrity under heavy load, while the 2-piece rear main seal compatibility ensures broad application across various BBC block generations. This crankshaft is the ideal choice for builders looking to combine increased stroke with the legendary durability of Callies engineering. Elevate your engine's performance potential with the best components available at GGCRACING.

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