Maybe I've misread your post.

Have you had a failure and you need to replace failed parts? Or is this some kind of 'recommended replacement'?


If this is being proposed to fix a specific problem, what were the symptoms? And how was this diagnosed?

If this was a 'car was doing XYZ, took it in- SA called and said "looks like the turbo hoses are shot, need replacing- 1200" you likely need more details on the diagnosis.

Finally, ask for a list of the 5 part numbers they are proposing to replace for $1200. It is a reasonable request.