Keith Browning Posted May 21, 2017 Share Posted May 21, 2017 Contrary to what the WSM procedure tells you, the down pipe catalyst does not need to be removed. As a matter of fact, because the fasteners tend to screw with you (at least for me they do) it makes sense. All it requires is that you back the studs out of the turbo outlet. This one had a failed center bearing that also dumped some oil in the exhaust. It would not make any boost but it made a cool humming sound. And if you need to remove the aftertreatment injector, an oxygen sensor crows foot is recommended, Quote Link to comment Share on other sites More sharing options...
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