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The Treadstone blockoff plate for Borg Warner EFR turbochargers is perfect for anyone that needs to run an external bypass valve or blowoff valve outside of the built-in-turbo designed bypass valve. The plate/plug is made out of billet aluminum, precisely CNC machined to fit perfectly in your EFR turbo. A high temperature silicone o-ring is also included to make a proper seal and withstand the heat of the compressor housing.
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