LSx Chevy Callies Magnum 4.125″ Stroke Crank w/8 Counterweights – LS1 Gen III – IV

The Callies Gen II/IV LS1 Magnum Crankshafts with 4.125″ stroke with 2.100 rod journals. Fully Counterweighted (8) with an average weight of 47 lbs, Magnum Crankshafts are one of the most durable on the market. Manufactured from pure SAE 4340 Steel with multiple heat treatments for amazing strength and long life.

• Gun Drilled Mains and Lightened Rods
• 8 Counterweight Design
• Dual Linear Post Keyways
• LS7 Post / Snout configurations
• Counterweight prepped for 1850 gram bob weight
• Premium Ultra Case Deep Nitride Heat Treatment
• 2.100″ Rod Journals with 2.559″ Mains
• Enhanced rod oiling through the use of Main Bearing Oil Hole Lead-ins
• Gun Drilled Mains