GAS E90 Monoball Thrust Arm Review

Raimund · 06-08-2023, 12:18 AM

I recently installed German Auto Solutions thrust arm monoballs into my M3 arms. They cost $250 plus a $35 tool rental fee ($200 deposit)

I had been having issues with front end stability under hard braking and was advised by some track guys to install these.

I had read online of people having increased NVH on monoballs in general and other noting no increase in NVH. I was on the fence between these and the powerflex bushings.

Install was easy, and GAS has a step by step video on their YouTube. It took me about an hour and a half taking my time. I would highly recommend renting their tool as it removed the old bushings and pressed in the new monoball with ease.

I have now driven a few hundred miles on them, and I am very satisfied with the result.

I noticed zero increase in NVH, and have driven them on very poor roads.

Braking stability is greatly improved, with no sloppiness like before. Aslo, the old M3 bushings only had 40k miles on them and had no visible damage or play.

Turn in feels much better, with an improvement in steering feel.

In summary I would say these are a total win. I spoke to someone else today who had these in for 40k mile with street and track and no issues.

Next up are aluminum rear subframe bushings

The Nightman · 06-08-2023, 01:58 PM

I ran these and wish I could've kept them. Incredible upgrade to precision, handling and feel, but unfortunately they made impacts from bumps significantly harsher. If only I had smoother roads or only drove on the highway!

Raimund · 06-08-2023, 05:30 PM

Quote:

Originally Posted by The Nightman

I ran these and wish I could've kept them. Incredible upgrade to precision, handling and feel, but unfortunately they made impacts from bumps significantly harsher. If only I had smoother roads or only drove on the highway!

That's a bummer. I have poor streets by me as well but already have coilovers,m3 arms, poly bushings, etc, so maybe that's why any extra nvh from them is imperceptible to me.

Or maybe it's due to different shocks between us. Bumps were much harsher on my bilstein shocks than the current koni yellows I have as they dont "crash" like the billys did

Peter Morrin · 06-09-2023, 10:16 PM

Thank you for this review. I went with the Powerflex bushings, but I don't think there is any question that the GAS monoball is the higher performance system. Knowing some of the Colorado roads, your report is a good testimony to acceptable NVH. How are they on the missing chunks of pavement on the I70 near the Eisenhower tunnel?

06-08-2023, 12:18 AM	#1
Raimund Private First Class 133 Rep 152 Posts Drives: 06 330i Join Date: Nov 2019 Location: Colorado iTrader: (0)	GAS E90 Monoball Thrust Arm Review I recently installed German Auto Solutions thrust arm monoballs into my M3 arms. They cost $250 plus a $35 tool rental fee ($200 deposit) I had been having issues with front end stability under hard braking and was advised by some track guys to install these. I had read online of people having increased NVH on monoballs in general and other noting no increase in NVH. I was on the fence between these and the powerflex bushings. Install was easy, and GAS has a step by step video on their YouTube. It took me about an hour and a half taking my time. I would highly recommend renting their tool as it removed the old bushings and pressed in the new monoball with ease. I have now driven a few hundred miles on them, and I am very satisfied with the result. I noticed zero increase in NVH, and have driven them on very poor roads. Braking stability is greatly improved, with no sloppiness like before. Aslo, the old M3 bushings only had 40k miles on them and had no visible damage or play. Turn in feels much better, with an improvement in steering feel. In summary I would say these are a total win. I spoke to someone else today who had these in for 40k mile with street and track and no issues. Next up are aluminum rear subframe bushings __________________ I don't check PM, DM me on Instagram @rai_n52 22RPD Vendor - 2006 330i - N54 Intake Manifold l N54 Throttle Body l Gruppe-M Intake l MILVS l 22RPD E85 Tune l S65 Injectors l HZ Racing Headers l TCKLINE SA Coilovers l M3 Front Arms l VWETISH Diff Brace l 3,91 Differential
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06-08-2023, 01:58 PM	#2
The Nightman Cometh 973 Rep 1,192 Posts Drives: Boy's Soul Join Date: Jul 2016 Location: Boy's Hole iTrader: (4) Garage List E90 LCI "330i& ... [10.00]	I ran these and wish I could've kept them. Incredible upgrade to precision, handling and feel, but unfortunately they made impacts from bumps significantly harsher. If only I had smoother roads or only drove on the highway!
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06-09-2023, 10:16 PM	#4
Peter Morrin Private First Class 45 Rep 151 Posts Drives: 2007 E90(sedan) 328xi Join Date: Dec 2021 Location: Kingston, Ontario, Canada iTrader: (0)	Thank you for this review. I went with the Powerflex bushings, but I don't think there is any question that the GAS monoball is the higher performance system. Knowing some of the Colorado roads, your report is a good testimony to acceptable NVH. How are they on the missing chunks of pavement on the I70 near the Eisenhower tunnel?
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