If you have a Z car, this is a required modification as soon as you want to put a larger front sway bar on the car. Reinforcement plates. Without these, the larger sway bar will literally pull itself out from the treads and cause major issues. No one told me, I managed to just see them, and once I looked in to it, I was shocked!
https://zcardepot.com/products/sway-bar-mount-reinforcement-plate-front-240z-260z-280z?variant=32170183262321¤cy=USD&utm_source=google&utm_medium=cpc&utm_campaign=google%2Bshopping&gad_source=1&gad_campaignid=17820837536&gbraid=0AAAAADgHqXunKXwkRdKYJKxJH-WU_4VvI&gclid=CjwKCAjwruXBBhArEiwACBRtHZNWcNIiwbMvUrypRpviE3xNi1UuajMNdG7ffhovH9Z5NiwuNSG0IhoCQwYQAvD_BwE