Callies Duramag billet crankshaft Duramax Diesel 2001-2016 LB7/LLY/LBZ/LMM/LML

The Callies Duramag billet crankshaft is designed to be the last crank you ever need for your LB7 thru LML Duramax engine. These cranks are fully machined from domestically-sourced 4330 steel in our Ohio plant. Intended for the most extreme applications, some features of these shafts include large fillet radii across all journals, a nitrided surface, narrowed rod journals (2.154”), and straight shot oil holes. Additionally, these billet cranks are intended for an internal balance, resulting in reduced harmonics under high loads.

• Duramag

  Standard Features Average weight = 78 lbs.

  • Deep DuraCase nitride treatment that is durability and wear enhancing
  • Large True Form fillet
  • Keyed Shear Proof timing gear fit
  • Dual keyed shear-proof snout
  • Keyed shear-proof timing gear fit
  • Drilled rod journals for reduced inertia and ease of balance
  • Standard Duramax diameter but with strength enhancing 2.154 width
  • Machined from 4340 hardened steel
  • Main bearing oil holes are machined with lead-ins for enhanced cold start oil flow to rod journals
  • Will accept OEM post and flange bolts
  • Balancing is required