What is a Sirring Rack?

Hello, I think you mean "steering rack" - or rack and pinion style steering gear. This is the actual gear mechanism that uses hydraulic fluid to turn your front wheels left and right when you turn your steering wheel. A steering gear on this vehicle would indeed be expensive. I would highly recommend a second opinion by another shop, since it seems like they may have not resolved the problem with the first repair. Here are some shops near you that you could visit for another opinion: https://repairpal.com/repair-shops/kia-repair-and-service-in-austin-texas