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      11-26-2020, 11:29 AM   #11
N8N
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Drives: 2009 E92 335i 6MT
Join Date: Sep 2012
Location: Sterling, VA

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I got the following reply from Koni when I asked:

Thank you for contacting us here at KONI NA. Yes, you will need to reuse your factory OE bumpstops for replace those stops when installing the KONI Special ACTIVE dampers. It is recommend to use the factory bumpstop, thus it will depend on whether you have the factory equipped sport suspension or not. If using a lowering springs I would suggest the Sport suspension stops.

So, does this mean that the only difference between standard and sport bump stops is height and/or durometer?

I guess if they both fit I will just look up the parts on realOEM and make sure I get the sport ones. Or I have heard of times where bump stops have been used as progressive springs... would it make sense to use taller standard ones? oh no another rabbit hole

Per RealOEM:

front bump stop is 31336767333 "additional shock abosrber, front" but that is just the bump stop only (for sport suspension; w/o sport suspension is 31336771352)

boot is 31331094749 "protection tube"

Part no. 31302405872 on realOEM appears to be "Repair kit, additional damper guard tube" appears to be bump stop and boot, for whatever reason description is misleading, says rear but appears to be front. 31302405874 is the same part for standard suspension.

for the rear, the sport suspension bump stop that appears to come with the tube ("auxiliary shock absorber, rear") is 33536767335, standard suspension is 33536767334

so I think I see what I'm going to order tomorrow (basically stock replacement parts for "sport suspension"); do you think I should order any kind of camber plate with my order? I do have M3 strut rods but otherwise car is 100% stock.

Last edited by N8N; 11-26-2020 at 12:02 PM..