If you want tighter setup control on your TRF420 chassis, the Tamiya 54943 Suspension Arm Bushing A-C set is a straightforward upgrade. These aluminium bushings are made for the TRF420 suspension and let you shift damper positions quickly to match track conditions and driving style.
The A-C geometry provides an alternate offset compared to the stock B bushings that come with the TRF420 kit. That different mounting position gives you finer adjustment range for roll and responsiveness across a variety of surfaces.
These bushings also fit the TA07 PRO chassis, making them handy if you run multiple Tamiya rigs. The blue anodised coating gives a neat look while helping resist wear and corrosion so the parts stay true over time.
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