Timing Sprocket

The GM Genuine Parts Camshaft Sprocket (GM Part #12591689) is an OEM-engineered timing component designed to maintain precise camshaft-to-crankshaft synchronization in GM LS-based engines. Manufactured to GM’s original specifications, this sprocket ensures proper timing accuracy, durability, and long-term reliability for both street and motorsports applications. Sourced and supplied by Katech Engineering, this camshaft sprocket is the correct replacement for worn or damaged OE components. It is well-suited for engine refreshes, timing set service, and professional-grade builds where factory geometry and timing integrity must be preserved. Constructed from hardened steel and precision-machined to exact tolerances, the GM Genuine Parts camshaft sprocket delivers consistent chain engagement and dependable performance across a wide RPM range. Key features include its genuine GM/ACDelco replacement component status, maintenance of correct camshaft timing and chain alignment, precision-machined hardened steel construction, and design to GM OE specifications for fit and durability. It is ideal for stock, performance, and race engine service. Professional installation is recommended to ensure proper timing setup and engine operation.