TRF421 Front Bulkhead Brace 1mm/2mm Performance Pack by Factory Pro O-TCP006 for Tamiya  [FP-O-TCP006]

Front bulkhead brace set for TRF421 tuning

This Factory Pro supply contains front bulkhead braces made to fit the Tamiya TRF421, provided as one 1mm plate and one 2mm plate to let you vary front stiffness. These aftermarket parts let you adjust chassis response without changing the original bulkhead layout.

The practical aim is to let you swap plates to test understeer versus oversteer tendencies and tune front grip to suit track surface and conditions. The set is compact and aligns with TRF421 bulkhead mounting points for quick changes between sessions.

Fitting procedure and tuning role

Installation uses the TRF421's existing bulkhead fasteners; remove the stock brace, position the selected plate, and secure using the vehicle's standard torque settings. Use the thinner plate for more compliance on low-grip tracks and the thicker plate for a firmer, more immediate steering feel.

When evaluating changes, alter only the brace thickness so lap comparisons reflect the brace effect alone. That approach helps you fine-tune predictable setup changes to improve lap times.