Description
Engineered for high-output street and competition applications, Callies forged 4340 steel crankshafts for the GM LS platform provide an exceptional balance of tensile strength, fatigue resistance, and rotating assembly reliability. Featuring a standard 1-piece rear main seal design and a 4.000" stroke, this crankshaft serves as the proven benchmark configuration for popular 383ci, 408ci, 416ci, and 427ci LS stroker combinations. Precision ground and micro-polished journals ensure superior bearing life and consistent oil film control under heavy loads.
| Specification | Detail |
|---|---|
| Engine Platform | GM LS Series (Gen III / Gen IV) |
| Material | Forged 4340 Steel |
| Rear Main Seal | 1-Piece Seal |
| Stroke | 4.000" |
| Main Journal Diameter | 2.559" (Standard LS) |
| Rod Journal Diameter | 2.100" |
Features:
- Precision forged from high-tensile 4340 aircraft-grade steel for maximum torsional strength
- Proven 4.000" stroke geometry ideal for 383, 408, 416, and 427 cubic-inch LS stroker builds
- Compatible with standard 1-piece rear main seal GM LS series engine blocks
- Precision ground and micro-polished 2.559" main and 2.100" rod journals for optimal bearing life
- Optimized counterweight profiling for simplified precision balancing and oil windage control
- Built to withstand the cylinder pressures of high-horsepower naturally aspirated, nitrous, and forced induction setups
Details
Shipping Information
- H12.00"
