There is a reason those pumps are so pricy. They have to generate enough volume and pressure to overcome the exhaust pressure and then some.
I still think OEM is stupid expensive. I would probably get a used one vs. buy OEM. (especially knowing how to use a 5 series or 7 series model on the e53) (more source material)
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2011 E70 • N55 (me)
2012 E70 • N63 (wife)
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