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Suspension & Braking Forum by BimmerWorld
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Old 11-11-2014, 11:48 PM   #1
Rob43
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Rear Shock Spec Info / E46 & E36 M3

I'm writing this as a follow up to another thread I started titled "$ Cheap ADJUSTABLE Rear Shocks / Found !", the question in a lot of the PM's I've gotten are; What are the "normal" rear shock dimensions ? Well after several phone calls to Bilstein USA, Koni USA, & KYB; All I can say is that some of these dimensions are All Over The Place !

http://forum.e46fanatics.com/showthread.php?t=1057455

**All of these are REAR Shocks.**

E46 Models:
1) Bilstein Sports #24-027250: Extended Length 22.9", Compressed Length 14.5" Stroke 8.4"
2) Bilstein HD #24-027243: E/L 23.5", C/L 14.5" Strk 9.0"

3) Koni Sport #8040-1271SPORT: E/L 23.4", C/L 14.5" Strk 8.9"
4) Koni STR.T #8050-1051: E/L 23.4", C/L 14.5" Strk 8.9"

5) KYB Excel-G #343352: E/L 23.9", C/L 14.6" Strk 9.3"

*******************************************

E36 Models:
1) Bilstein Sports #24-024532: E/L 23.9", C/L 17.7" Strk 6.2"

2) Koni Sports #8240-1115SPORT: E/L 24.3", C/L 14.6" Strk 9.7"

3) KYB AGX #741033: E/L 21", 14.2" Strk 6.8"

This info will most likely be Folded into my Spring Testing Thread.


Good luck,
Rob43
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Old 11-12-2014, 05:38 PM   #2
herrhaensel
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Very interesting...

So it appears those e36 spec KYB AGX shocks have compressed length similar to all e46 shocks, which is good news. The extended length being 2-3inches shorter is quite a difference, but being lowered and not driving like a maniac, I shouldn't have an issue with insufficient droop travel.

Are those e36 Bilstein Sports specs for the M3? If so, isn't its compressed length far too long for the e46 chassis? Many people seem to recommend using e36 M3 rear shocks instead of the e46 versions, as the e46 ones seem to have some chronic failure issues...

Thanks for getting all this info together though, those KYB AGXs look like a great deal now...
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Old 11-18-2014, 09:05 PM   #3
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A good top adjustable Koni as an alternative to the TCK SA rear shocks are the yellow Konis for older Porsches, the Koni 1159


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Old 11-18-2014, 10:50 PM   #4
Rob43
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Quote:
Originally Posted by dreamdrivedrift View Post
A good top adjustable Koni as an alternative to the TCK SA rear shocks are the yellow Konis for older Porsches, the Koni 1159

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That sounds good if it fits an E46, what's the exact model number, or link ?



Rob43
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Rob #43 ITS/ITR/STU, BMW 325I, STU LAP RECORD
SUMMIT POINT WV 1:24:229 S.C.C.A.
(DynoDynamics https:vimeo.com/8486878 Dyno Video)
"Chance Favors The Prepared Mind"

Need Help With Your Nitrous Ambitions ?.....PM ME
Quote:
Originally Posted by RacerX View Post
Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!
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Old 11-18-2014, 10:57 PM   #5
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Quote:
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That sounds good if it fits an E46, what's the exact model number, or link ?







Rob43

It should as the e46 and e36 rear shocks are interchangeable. These are the Koni 8210-1159 shocks. They have a 12mm shaft so they won't work w OE RSMs, but any aftermarket ones like GC or RE will work. The metal dust cover that they come with do not fit with the top mounted RSMs, though.


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Old 11-18-2014, 11:09 PM   #6
Rob43
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Quote:
Originally Posted by dreamdrivedrift View Post
It should as the e46 and e36 rear shocks are interchangeable. These are the Koni 8210-1159 shocks. They have a 12mm shaft so they won't work w OE RSMs, but any aftermarket ones like GC or RE will work. The metal dust cover that they come with do not fit with the top mounted RSMs, though.

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They look good, but the Ground Control (Special Koni Sport) SA / Top Adjustable rear shock is almost $50 dollars cheaper at $199.


Rob43
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Rob #43 ITS/ITR/STU, BMW 325I, STU LAP RECORD
SUMMIT POINT WV 1:24:229 S.C.C.A.
(DynoDynamics https:vimeo.com/8486878 Dyno Video)
"Chance Favors The Prepared Mind"

Need Help With Your Nitrous Ambitions ?.....PM ME
Quote:
Originally Posted by RacerX View Post
Nitrous is a little trickier than boost, but it's not the spray that kills motors, it's STUPIDITY!!

Last edited by Rob43; 11-19-2014 at 02:45 PM.
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