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Old 03-30-2021, 12:43 PM   #4
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There are other threads and posts in this forum from people with lots of experience that say Porsche used the latest available IMSB that was in production when the replacement engine was made, regardless of what the original engine had, and the only way to tell what IMSB is in a Porsche replacement engine is to remove the transmission and flywheel and inspect the IMSB flange. So the seller could be correct, but there is no way of knowing without some documentation or disassembly.
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