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You support your comment on which reasons, only turbines are bigger so heavier but well balanced, bushing turbos was the original technology and have worked fine for many years before the BB ones which only a cartridge change is possible and very costly. I guess you wrote this because of the chinese shaft and exhaust housing, the only one used. The chinese cartridge his the only one that longevity is questionnable. I have open one so I know how they are built...about you?
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