This Tamiya replacement lower bulkhead is supplied as an RC-scale spare to suit the TRF421X homologation configuration where the original part 42391 is specified. It secures lower suspension attachment points and helps keep drivetrain components positioned correctly within the chassis. The text focuses on direct fit and workshop use rather than sales language.
For racers and tuners using TRF421X platforms, replacing a damaged bulkhead restores intended suspension geometry. Confirm the 42391 reference and inspect alignment of mount bosses before final tightening. Proper installation supports consistent setup changes and repeatable handling responses.
Lower Bulkhead: 42391 TRF421X
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