I have a 911 carrrera S , 2017 model , used it less than 6000 miles , since I started driving my wife’s Tesla , I found the feature very useful in which the car maintained a safe distance from the car driving ahead , I wish I had got it when I git the car customized , but is it possible to get it retro fitted now after more than 2 years , thanks for feedback

 

You talking about Adaptive Cruise Control (ACC)? I have a Tesla Model 3 and the TACC system is phenomenal - I use it every day for my commute. I do think it is more advanced than the Porsche ACC. There is a thread here about someone retrofitting ACC on their non-ACC car, can't remember where. It is a PITA to do it.