2001-2016 Duramax Callies DURASTAR Forged Steel Keyed Crankshaft

Stroke    Main    Pin    
3.898    3.146    2.477

Durastar advantages:

• Deep DuraCase ™ nitride treatment that is durability and wear enhancing
• Large True Form fillet radii in all journals
• Keyed Shear Proof timing gear fit
• Drilled rod journals for reduced inertia and ease of balance
• Stock 3.898” stroke with OEM journal diameters and width
• Machined from 4340, through hardened steel
• Dual keyed damper fit
• Conservatively rated for 800hp @ 800 ft / lb torque
• Will accept OEM post and flange bolts
• Machined to accept OEM flywheels / flexplates
• All journals are polished to a 6Ra or finer finish
• Main bearing oil holes are machined with lead-ins for enhanced cold start oil flow to rod journals