The Tamiya 9007664 Diff Pulley & Case is produced to tight tolerances to enhance the TRF421 chassis drivetrain. Its design focuses on steady diff action and long term durability for serious setup work.
This Tamiya 9007664 part helps reduce slop and maintain gear engagement under acceleration, giving a clearer response from steering inputs. It is suited to drivers chasing repeatable lap times.
Built to withstand regular track use, the diff pulley and case is easy to service and integrates into standard TRF421 maintenance routines. Its robust construction reduces the need for frequent replacements.
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