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Old 06-14-2012, 12:43 PM
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the original pump ALPINA uses (made by BOSCH) is not available anymore.
don't go with the regular 535i (not even M5) pump though, it doesn't have
enough pressure/flow and could cause engine/cat damage if you push the car.
if you want to stick with BOSCH, you might be good with a 044 motorsport one.