Our 4.125" LS crankshafts are engineered from a 4340 billet steel alloy, forged using non-twist technology, and shot peened to reduce surface stress. Each crankshaft is heat-treated to increase tensile strength and nitrided for enhanced surface durability. The reluctor wheel comes pre-installed for easy setup.

LS 4.125" 6-Counterweight Crankshaft:
4.125" Stroke
6-Counterweight Design
Gun-Drilled Main Journals
Standard LS Wet Sump Snout
4340 Forged High-Tensile Alloy
Rated for up to 1,300 horsepower

Average Weight: 54 lbs