This is the GM Gen IV LS Timing Chain. This is an upgrade to the original timing chain that came with Gen III LS1 / LS6 motors. Note the difference between the Gen III and Gen IV timing chains in the images. Supersedes old part #12586482.
- GM Part # 12646386 – GM Gen IV LS Timing Chain
- GM LS-series Engines 1997-2014
- GM LT Engine 2014