We do not know of any easily available upgrade option for the stock pilot bearing,
although we feel the stock pilot bearing is not very durable. We recommend
changing out the stock pilot bearing at every opportunity possible (every clutch
change), as it is easily damage when reinstalling the transmission or engine.
We've been thinking of using silicone impregnated bronze as a pilot bushing, but
this will actually being a downgrade rather than an upgrade.
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