Diamond Eye Performance lists this 4-inch stainless steel downpipe for 1989–1993 Dodge 5.9L applications as a machined component in the catalog record. Presented as a 4in SS downpipe machined to fit the specified model years and engine, the overview sticks to the source-provided identity and fitment without asserting flow numbers, materials beyond stainless steel, or installation specifics not in the description.
Diamond Eye Downpipe 4in SS: 89-93 5.9L DODGE MACHINED EF