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After power steering pump failure on the track, I'm using an AGA Tools PS reservoir with small reservoir(like GT4?) that is connected to the vent hole by a hose during several years. Perhaps this product has never been mentioned in this forum, because our vehicles are not on the application list. But, BMW uses the same shit in almost every models, this product is perfectly compatible with our car.
Anyway, this has a real filter, not like OEM mash filter that doesn't work well. So it will help the durability of the pump, IMO.
Small reservoir is a bike brake fluid tank, and I fill this with a little cottons.
There has been no problem at all for my track only E92 M3 during 4~5 years. I'm very satisfied with the clean engine room and the perfect performance.
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2011 LCI W/DCT / K&N drop in filter / CSF radiator / do88 oil cooler / do88 DCT cooler / Akra Evo / Moton CS 2 way coilover / Wiechers strut bar(F) / ARC strut bar(R) / Alcon Superkit BBK / Tarox rotor / Geoff steel EHPS / Sard carbon-Kevlar GT wing / GT4 carnard / Aim Evo4+G-dash+GT Steering+S/C GP HD / Bride Zeta3 / etc.
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