I have an RB25DET Turbo for sale, it comes with a stainless steel dual chamber turbo outlet. The turbo is a dual ceramic ball bearing and it’s T3 Flanged. This turbo is equivalent to a T28 in size I believe and the exhaust side fins are made out of ceramic. Code on it is 45V4.
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Btw i took the pic from ebay for the turbo outlet…