The fuel pressure looks fine, your gauge is probably reading a few PSI low. If you wanted to do a good test for fuel delivery you need to test under load with gauge taped to the windshield but that's not going help explain why it's running rich now. Did you pull the regulator hose off the boot and check that ?? Why did the PO change the injectors?

It might be a good idea to play around with adding vacuum or pressure to the reg hose like I was saying and watch the fuel trims just to make sure about if rich is rich or rich is compensating for lean.

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1988 325is (purchased new) sold
2004 X5 3.0 2005 X3 2.5
2008 X5 3.0 (new to me)