Tamiya 3451580 Upper Arm Mount A for 42391 TRF421X Chassis  [3451580]

Price:
NZD$0.00
Brand:
Tamiya
Model:
3451580
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Durability-Focused Upper Arm Mount A for TRF421X

The upper arm mount A, item number 3451580, is the factory-design replacement for the 42391 TRF421X assembly. It secures the upper suspension arm on the TRF421X, providing the original mounting interface for repair or routine upkeep.

Fit and function: this part returns the suspension to its intended geometry without altering kinematic behavior. When fitting, verify orientation and apply the service-specified fastener torque to avoid introducing binding or looseness in the suspension links.

Tuning role: installing a fresh mount eliminates play from worn mounting points so subsequent setup adjustments—such as camber, roll center, and arm length checks—are based on correct baseline geometry.

A new 3451580 mount restores original fit, which reduces joint wear caused by play; lifespan depends on track conditions and driving style but starts from the correct factory geometry.
Check for elongated screw holes, surface cracking, or deformation at mounting points. If any of these signs are present, replacement with 3451580 for the TRF421X is recommended.
After installation, confirm fastener torque and recheck link free-play after a short run; re-torque if necessary to keep the TRF421X suspension stable.

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