Tamiya 3451584 Damper Stay Mount for 42391 TRF421X Chassis  [3451584]

Mounting stay for TRF421X tuning

This is an RC damper stay sold as part number 3451584 from Tamiya, intended for the 42391 TRF421X chassis. The stay provides the shock mounting points and is designed to replace the original stay on compatible TRF421X builds.

In function the damper stay sets shock mounting locations and angles, allowing adjustments to leverage and shock geometry without swapping arms or towers. When tuning, the stay helps test shock angle and mounting height to influence transient response and roll behavior on 1/10 scale touring cars.

Fitting is simple on standard TRF421X assemblies: remove the stock stay, move across any existing spacers or bushings, then secure the replacement using the chassis screw locations. No chassis modification is required when used with the intended TRF421X parts, but check alignment and thread engagement during reassembly to ensure a secure fit.

Use this stay to make controlled, reversible changes to shock geometry on TRF421X setups, keeping adjustments focused on suspension tuning rather than major component swaps.