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Seems like the hard line going to the rubber piece to the sending unit is blue, so I think the return is blue and the feed in must be black. That is how my fuel filter was hooked up, when I removed it. The brand was Hengst. I'm now feeling like it's maybe the sending unit with a restriction vs the pressure regulator just being off at 80psi. This fuel filter was new from the mechani
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2003 X5 3.0i Silver (build 07/03)
2006 X5 3.0i Blue
1977 Ferrari 308 GTB
1994 Ferrari 348TS Speciale #14/15
1989 Ferrari Testarossa
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