BMW M3 and BMW M4 Forum - View Single Post - Spool Performance HPFP now available for the S55!

Wanted_M · 11-09-2020, 07:13 PM

I have a question and excuse my ignorance as I'm still learning the ways of BMW M's. Why can a piston be made/fitted to stock HPFP OEM housing like Autotech does for Audi's?
See below. this upgrade gave us the opportunity to run up to E50 on my S4 and sorry if the question was previously answered. If stock system can get E50/55, the piston should easily get E60/70.
https://autotech.com/mm5/merchant.mv...de=10-127-101K

11-09-2020, 07:13 PM	#56
Wanted_M Captain 759 Rep 950 Posts Drives: Frozen Blue M4CS Join Date: Jul 2009 Location: Norcal iTrader: (2)	I have a question and excuse my ignorance as I'm still learning the ways of BMW M's. Why can a piston be made/fitted to stock HPFP OEM housing like Autotech does for Audi's? See below. this upgrade gave us the opportunity to run up to E50 on my S4 and sorry if the question was previously answered. If stock system can get E50/55, the piston should easily get E60/70. https://autotech.com/mm5/merchant.mv...de=10-127-101K __________________ M4CS Frozen Blue ARM DP's/Resonated Mid-pipe \| SPL links \| Hotchkis bars \| JRZ RS2/camber plates \| K&N \| Koyorad HX \| Powerflex purple \| Rouge \| Spiegler \| Speed Eng. snorkel \| Vargas CBC/hub \| Wagner IC \| xHP \| Xpel stealth ppf Last edited by Wanted_M; 11-09-2020 at 07:21 PM..
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