These shift bushings are made from impact-resistant Torlon 4203L. It is much stronger than the Mazda OEM bushing, but still being plastic, can absorb the impact energy of hard shifting metal replacements cannot. This can protect your shift forks, shift fork pads, and other internal gearbox components. It is precision machined, so it fits perfectly with much less slop than OEM. It is also a snap fit like the OEM bushing so won’t get left behind in the transmission during service.