This Tamiya replacement lower bulkhead serves as an RC-scale spare intended for the TRF421X homologation range where the original reference 42391 applies. It functions as a structural element to position lower suspension mounts and retain drivetrain parts within the chassis. The wording is factual and workshop-oriented rather than promotional.
When replacing a bulkhead on a TRF421X platform, verify the 42391 part reference and inspect mounting bosses and clearances prior to final assembly. Ensuring correct fit preserves chassis geometry and helps maintain consistent handling during setup work.
Lower Bulkhead: 42391 TRF421X
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