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xDrive upper control arms (tension struts) w/ Powerflex pff5-4101 PU bushings
| 01-01-2021, 03:57 PM | #1 |
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xDrive upper control arms (tension struts) w/ Powerflex pff5-4101 PU bushings
OEM Lemforder xDrive front upper control arms ("tension strut" in BMW language) with Powerflex pff5-4101 polyurethane bushings installed. All parts have 14 months and 8585 miles of use. $150 shipped in continental US for the full L+R arm and bushing set. Make an offer if you want only the bushings or only the arms.
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F31 328i xDrive, EBII
Last edited by ktw; 01-05-2021 at 01:21 PM.. |
| 01-04-2021, 05:47 PM | #2 | |
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Quote:
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2015 328i xDrive GT
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| 01-04-2021, 06:40 PM | #3 |
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Meant to include those! The arms are 31126854723 and 31126854724--both Lemforder OEM. The bushings are pff5-4101 as per the first post. I should have unused nuts that go on the ball joint ends to include too.
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| 01-04-2021, 06:46 PM | #4 |
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Also, the bushing was installed with Energy Suspension Formula 5 grease and a single wrap of teflon tape (a recommendation from some to prevent squeaking). Probably makes sense to go ahead and regrease them before install though.
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| 01-05-2021, 10:49 PM | #5 |
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How do these compare to the VAC arms?
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2016 340i x-drive M-sport fully loaded. Pure800, Spool fx-150/ethanol analyzer/filter, VRSF catless dp, dinan mid pipe, MST intake, f80paul 93 tune via BM3, XHP, KW Street Comfort, f80 513M with square Michelin as3+ 255/40r18, carbon fiber rear trunk lip, black double slat grill, M-performance interior trim, smoke bumper reflectors.
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| 01-06-2021, 11:36 AM | #6 | |
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-TS: Powerflex polyurethane --> VAC monoball -LCA: KMAC adjustable polyurethane --> VAC monoball -top hat: OEM --> Millway street camber plate -dampers: Bilstein B16 --> FCM custom -springs: Bilstein B16 dual rate --> linear and higher rate Overall the most noticeable changes were in damping and cornering balance (alignment, spring rates), which aren't a result of the bushings. There was an increase in noise transmitted into the cabin, but a lot of that may be from the camber plates. In terms of responsiveness to steering inputs I think there was little change when I made these modifications (unlike the big improvement from stock to PU bushings+B16s). Sorry I can't give a more specific response!
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