OEM Torque To Yield Fastener: Designed to provide exact clamping force required to properly secure the harmonic balancer to the crankshaft. Single-Use Crank Bolt Design: Torque-to-yield construction requires replacement after removal to maintain correct retention and engine safety. Critical Balancer Retention: Helps maintain timing accuracy and vibration dampening in high-output LS and LT engine applications. Direct Replacement Fit: Installs directly in place of the factory crank bolt with no modifications required during service or rebuilds. High Performance Engine Compatibility: Intended for dry sump and high-performance LS and LT engines where proper crankshaft retention is critical. This OEM harmonic balancer crank bolt 11570163 is a torque-to-yield fastener designed for high-performance LS and LT engine applications including LS7 dry sump LS3 LS9 LT4 and LT5 platforms. Engineered to provide precise clamping force, this bolt securely retains the harmonic balancer on the crankshaft to maintain accurate timing stability and proper vibration control. As a torque-to-yield design, it is intended for single-use and must be replaced any time it is removed during balancer service or engine work. Ideal for engine rebuilds, balancer replacement, and performance maintenance, this crank bolt ensures proper installation and long-term reliability when installed to factory torque specifications.