All PhatShaft turbos for the 2003 through early 2004 Cummins require a 4" downpipe, as opposed to the factory 3.5". This downpipe replaces the factory downpipe and allows for the four inch outlet of the PhatShaft turbos.
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Description
All PhatShaft turbos for the 2003 through early 2004 Cummins require a 4" downpipe, as opposed to the factory 3.5". This downpipe replaces the factory downpipe and allows for the four inch outlet of the PhatShaft turbos.
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