Starter EGT Rubbers are critical shock-absorbing components positioned within the reduction gear assembly of modern starter motors. These dampers are seated between the planetary gear carrier and the starter housing to absorb the sudden mechanical shock and "kickback" generated during the engine's initial cranking phase. Manufactured from high-grade, oil-resistant synthetic rubber (Nitril/EPDM), they prevent metal-to-metal impact, significantly reducing internal noise and protecting the gear teeth from premature shearing or chipping.