Yokomo YD-2 aluminium rod end adapters
Coming from Yokomo and made for their YD-2 series aluminium and composite upper and lower front A-arms are aluminium rod end adapters. Machined from high-grade aluminium and coming hard-anodised for surface protection, the adapters are direct replacements for the standard steel parts and they are made to reduce the weight of the front suspension which can lead to improved steering characteristics in certain track conditions. The adapters are available as 20mm and 23mm upper arm variants and as 27mm and 30mm lower arm parts, the latter being laser-etched with track width markings to make setup easier.
Source: Yokomo [teamyokomo.com]