This aluminum rod end adapter can be used on chassis of YD-2 series or YD-4 equipped with A-arm conversion. It is lighter than the steel adapter used for the lower arm and is effective in improving driving performance. It is longer than the standard adapter contains in the kit, and it fits together very well with the aluminum lower A arm. In the caseusing it together with a resin arm, the arm length will be longer and will have a wide tread.