Fits: 2001 thru 2016 Chevy Silverado/GMC Sierra 2500HD/3500HD LB7/LLY/LBZ/LMM/LML Duramax Diesel

*Please call for availability*

Callies has developed a Duramax crankshaft that employs the industry’s best ideas. Improving the balance characteristics of this crankshaft was a primary design consideration. Increased counterweight angles, diameters and thickness are instrumental in making this the easiest balancing crankshaft of its type on the market today. For improved stiffness and durability rod journals are machined to a width that maximizes the effectiveness of all rod bearing inserts without unnecessary connecting rod mass. All Callies Duramax crankshafts are machined from triple heat treated 4330v steel before receiving our Perma-Case nitride. These crankshafts will accommodate all bearing inserts commonly available for GM Duramax engines. Callies Ultra billets are machined from Premium Grade (Para-Pure) Timken alloy steel. This high quality specialty steel has been formulated to create a level of toughness that is unmatched in the crankshaft industry. Each Ultra billet crankshaft is uniquely machined with our Ultra-Shed counterweight profiles. The Ultra-Shed leading edge profile gently moves oil away from the oncoming counterweight while the directional trailing edge directs oil away from the oncoming rod journal. Our Aero-Shed super finish will give you a crankshaft that is totally stress-riser free and incredibly aero efficient. When the Ultra-Shed and Aero-Shed processes are combined, the result is a crankshaft with the lowest coefficient of drag in the industry.

Features:

• Internally Balanced
• Narrowed Rod Journals For Added Crankshaft Strength
  
• Machined from triple heat treated 4330v steel
• Dual Damper Keyways
• OEM 3.900 Stroke
• Rods Must be Narrowed if using a factory replacement rod. We recommend Carrillo HD High Performance Rods which require no modification.
• Std 8 bolt flange, 3.898 (stock) stroke, Mains; Standard Duramax diameter and width, Rod Journals; Standard Duramax diameter with Narrow 2.154 inch. (strength enhancing) width. Damper and Timing gear fit diameters are Keyed for durability. Machined from Timken 4330VM

Notes:

• Does NOT include main bearings or thrust washer set
• We recommend sourcing main bearings/thrust washers through your machine shop
• Thrust washers should be hand fit for proper clearances prior to assembly by your machine shop
• THE MANUFACTURE, SALE, OFFER FOR SALE, OR INSTALLATION OF THIS PRODUCT IS NOT LEGAL IN CALIFORNIA.