Setting envoy proxy concurrency parameter at pod level

Hi Team, I am configuring the ProxyConfig parameter concurrency in our istio configuration. But this concurrency parameter is applied for all the pods sidecar globally. While I need to change this parameter only for those proxy sidecars which requires high throughput. Is there anyway to achieve this similar to resource annotations ?

Sample configuration:

annotations: : "4"	: "1Gi" |
          concurrency: 10