Description
Stock LS rocker arms experience wear under sustained high-RPM operation, leading to valve timing degradation and potential catastrophic failure. This chromoly trunnion upgrade kit addresses that weakness by replacing factory components with hardened, precision-engineered parts designed to handle extreme loads. Whether you’re building a dedicated race engine or maximizing reliability on a street-strip hybrid, this kit eliminates a known point of failure.
The GM OE LS Rocker Trunnion Upgrade Kit (1213462) is a direct bolt-on replacement that requires no additional machine work. Installation takes a few hours with basic hand tools and engine knowledge.
- Set of 16 trunnions
- 4130 chromoly construction
- GM LS-series fitment
- OE replacement upgrade
- Bolt-on installation
- Eliminates stock wear points
- Supports high-RPM operation
- MPN: 1213462
