Scientific auto service is a case in point:  you get what you pay for.  This shop was recommended to me by a car nut friend after I told him I needed work done on my car.  He mentioned two things: first, that it would be expensive (it is).  Second, that I could be sure I was getting top quality service. (I believe I did).  Overall, I found the mechanic to be extremely thorough.  This shop primarily deals with Porches and BMWs, though they may do work on other brands as well.
                        
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