Description
Callies Duramax Billet Crankshaft for Duramax Diesel (2001–2016 LB7/LLY/LBZ/LMM/LML)
Upgrade your Duramax engine with the ultimate in strength and reliability! The Callies Duramag Billet Crankshaft is engineered for extreme performance, making it the last crankshaft you’ll ever need for your LB7, LLY, LBZ, LMM, or LML Duramax diesel engine. Precision machined in Ohio from premium 4340 steel, this crankshaft is built to handle the highest stress and horsepower levels.
Key Features:
- Fits: 2001–2016 Duramax Diesel LB7/LLY/LBZ/LMM/LML
- Material: 4340 hardened steel, fully billet, 100% machined in the USA
- Weight: Average 78 lbs
- Surface Treatment: Deep DuraCase nitride for superior durability and wear resistance
- Enhanced Strength: Large True Form fillet radii, dual keyed snout, and narrowed 2.154” rod journals
- Oil System: Straight shot oil holes and main bearing oil holes with lead-ins for improved lubrication and cold start protection
- Performance Ready: Internally balanced to reduce harmonics under high loads (requires professional balancing before use)
- OEM Compatible: Accepts OEM post and flange bolts
Technical Specs:
- Stroke: 3.898″
- Main Journal: 3.146″
- Rod Pin Diameter: 2.477″
- Rod Length (Cammed For): 6.418″
- Part Number: D333MU@-MB
Why Choose Callies Duramax?
Designed for the most demanding applications, this crankshaft is perfect for high-performance builds and racing environments. Enjoy unmatched durability, precision engineering, and American manufacturing.
