Is that the Yeah Racing Carbon Down Stop Droop Plate on the S Chassis? Here is a link -
https://www.yeahracing.com/yeah-raci...t-033-00106030
If that is the Yeah racing part, I may have to get one for my car so I can covert the suspension arms to the 419 upgrade AND be still able to use droop screws. Also what a-arms are you using on the S chassis?