Tamiya 3451583 TRF421X Lower Bulkhead - Replacement 42391 for Chassis  [3451583]

Price:
AUD$0.00
Brand:
Tamiya
Model:
3451583
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How the lower bulkhead affects handling

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.

Original Name

Lower Bulkhead: 42391 TRF421X

Yes. The lower bulkhead locates suspension pick-up points; using an undamaged, correctly aligned unit is important when adjusting roll center or camber settings to maintain predictable handling.
If the new part matches the original geometry, setup should remain unchanged. Always recheck toe, camber and ride height after reassembly to confirm settings.
Fit fasteners loosely first, then adjust the suspension links so pick-up holes align before evenly tightening screws. Use reference points from the old bulkhead if available.
Yes, provided the replacement is free of deformation and installed with correct alignment; it helps keep setup changes predictable during tuning cycles.

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