Thread: HPFP swap
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houtan houtan is offline
Junior Member
Posts: 444
Join Date: Sep 2014
Car: 135i
Default 03-04-2019, 01:15 PM

Originally Posted by hardparker
The N54 and early N55 pumps are stronger than the standard N55 HDP5. The B58 plunger style pump won't fit to replace those rotary style ones.

The S55 pump is an HDP5 pump. I suspect it's equivalent to the N55 pump, thus the need to use two of them on the S55.
Thanks for the info.
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