Tamiya DF-03 Front Aluminium Hop-Up DF03RA-04 by 3Racing  [DF03RA-04]

Front arm outline

The DF03RA-04 aluminium front suspension arm is an aftermarket replacement for the Tamiya DF-03 chassis, designed to replace the factory plastic arms and provide a stiffer mounting point. The reduced flex helps keep steering and camber adjustments consistent during demanding driving or track sessions.

Because aluminium holds its shape under repeated load, the front end responds differently to weight transfer and steering inputs compared with plastic arms. Expect a sharper steering feel and more predictable alignment when tuning camber and toe.

Installation uses the standard DF-03 arm swap method: remove the original arms, refit compatible hinge pins and hardware, and secure the replacement arms while confirming hinge-pin alignment and ball-stud engagement. This part is an aftermarket upgrade and will not alter electronics operation.

For setup work, use the aluminium arms to refine front-end stiffness relative to rear settings; smaller adjustments to camber links or roll-center will be felt more directly once plastic compliance is removed. Check mounting points and fasteners regularly to ensure reliable performance.

A straightforward aluminium hop-up for DF-03 owners seeking less flex and steadier suspension behaviour during tuning and running.