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I used Borg Warner #6258 EFR turbo chargers which are light years ahead in material technology and engineering design. The lowest rotating turbine mass of any turbo currently on the market. Ball bearing and water cooled center sections.
My shop did the install, so I have no actual cost breakdown because I did so many other modifications at the same time. Including the purchase price of the car and all the modifications to date, which are insane in number, I have $110,000 in vehicle purchase, materials and parts and approximately $40,000 in labor if I paid myself average shop rates. If I were to estimate only the twin turbo install without any whistles and bells, I would guess $10,000 for the basic of installs. I consider this build to be as extreme as anyone can imagine. I'm 68 yrs old and simply wanted to cap off my engineering career with an over-the-top build.
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