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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > Review: Syncro Design Works Front Spherical Thrust Arm Bushing Conversion ~ '10 335i



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      08-12-2014, 07:43 AM   #1
M3Rob95
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Review: Syncro Design Works Front Spherical Thrust Arm Bushing Conversion ~ '10 335i

Hello everyone,

I would like to proudly review the new Syncro Design Works front thrust arm bushing solution that I just installed on my 2010 335i M-Sport. I purchased these from Markert Motor Works just north of Atlanta, GA so make sure you give them a shout!

At the same time, I opted to 'upgrade' to the M3 parts including the additional front control arm and the additional rear upper arm.



Upclose shot of the custom bushing/balljoint solution. The production versions will look much fancier, but this this is gorgeous as-is.


As soon as I dropped the car down, the vehicle's alignment was quite off due to the new geometry. I ran it down the street for a proper laser alignment and I could not wait for the results.

As soon as I was backing it out of the parking spot at the alignment shop, I could already tell a difference! I thought my brain might have been playing tricks on me but what was to come proved me wrong...

I proceeded to leave and as soon as I turned out of the lot, I hit the gas and I had the biggest smile on my face. I basically immediately shouted, "YES!!!!!". The car was night and day different. My car only has 50k on it and I had suspected they had been failed since around or even before 40k.

Shortly after, I brought the car to Atlanta Motor Speedway with Just Track It, Sponsored by Markert Motor Works.



This was a blast!!! It was approximately 90% of the oval, plus infield for a proper road course experience. The 335i would get up to 160+ on the back straight before throwing it into the banked left hand turn. It was EPIC and the parts did their job.

A big shout out to Motor Sport Media (Rich and Halston) for the awesome pictures.
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      08-12-2014, 08:12 AM   #2
M3Rob95
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Nice rear picture:



I also brought out my Spec E36.
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      08-12-2014, 08:32 AM   #3
M3Rob95
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This is not drifting, it's slip angle
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      08-12-2014, 11:31 AM   #4
AWDBooSTIn90
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So what is this exactly? An upgraded bushing for the m3 control arms?

Good review and even better pics!

I cant wait to get my m3 suspension parts on and track the car.
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      08-13-2014, 06:45 AM   #5
M3Rob95
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Quote:
Originally Posted by AWDBooSTIn90 View Post
So what is this exactly? An upgraded bushing for the m3 control arms?

Good review and even better pics!

I cant wait to get my m3 suspension parts on and track the car.


These upgraded bushings (really sealed factory BMW balljoints in a custom center housing that do not require maintenance) are available for both non-M cars and M cars. I just thought I would go ahead and throw on the M parts on my car since the cost was hardly any different than the non-M parts.

I was worried that they might transmit extra vibration, harshness, etc into the cabin during normal street driving but so far I have not really experienced anything too noticeable or obnoxious. I think my car already had exploded factory bushings when I bought the car at approx 40k miles so I am not sure if I have a proper base to compare them to on my personal car. I have driven many other e90s with new arms and I would say they feel similar.

What is nice about this solution is now the inner bushing (again, balljoint now in this case) will last just as long as the outer balljoint. When you take your car to the dealer, they just replace the inner bushing. They have a really nice special hydraulic tool for this job, so if any DIY goer is trying to knock this out, it is easier to just replace the arm. So instead of having to replace the arms twice as often just because of the inner bushing, you now have a solution that will last around 100k+.
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      08-13-2014, 12:43 PM   #6
AWDBooSTIn90
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So you bought the new m3 arms. And then had the bushings changed in 2 spots to better and more reliable versions?
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      08-13-2014, 02:18 PM   #7
M3Rob95
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Quote:
Originally Posted by AWDBooSTIn90 View Post
So you bought the new m3 arms. And then had the bushings changed in 2 spots to better and more reliable versions?
Correct, but basically you would purchase these arms already ready to install (P&P) with the upgraded balljoint and center housing already pressed into the arm. Nothing is worse than pressing in and out bushings/balljoints lol. We can leave that to the pros. You can probably install these in your car in less than 2 hours if you are learning as you go after you buy them fully assembled from Markert Motor Works / Syncro Design Works based out of Atlanta.

And again, the idea is that it is not as prone to wear as the factory rubber bushing, but it still allows the suspension to articulate on a multiplaned axis and this retains the movement of a rubber bushing, but it just doesnt have the same wear characteristics.
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      08-13-2014, 05:44 PM   #8
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nice whip! i don't usually like e90s but ur looks good! what kinda rims do u have on there?
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      08-13-2014, 06:16 PM   #9
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      08-22-2014, 03:26 PM   #10
M3Rob95
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Shoot Ian @ Markert Motor Works a call. They are the distributor for the Sycro Design Works products in our area. They can ship to your location as well.

His email is Ian@MarkertMotorWorks.com or call him at 678-809-6531.
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      08-22-2014, 03:27 PM   #11
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Theyre about $300 iirc, but I would have to double check.
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