[whosdady]

Originally Posted by ashmostro

What is the practical need for these other than damaged or bent factory arms? Is there real-world concern about the stock parts flexing?

For the record, I have all M3 or Megan Racing/Hardrace arms in the rear. Only the trailing arm is stock.

I've been eyeing these as well. They are on sale right now. I think it's important to switch out to power flex bushings at the same time.

[whosdady]

Originally Posted by ashmostro

What is the practical need for these other than damaged or bent factory arms? Is there real-world concern about the stock parts flexing?

For the record, I have all M3 or Megan Racing/Hardrace arms in the rear. Only the trailing arm is stock.

I've been eyeing these as well. They are on sale right now. I think it's important to switch out to power flex bushings at the same time.

[ECSTuning]

BMW E9x M3 Performance Rear Trailing Arm Set

[ECSTuning]

BMW E82/88 128i/135i Performance Rear Trailing Arm Set

[ashmostro]

Any answers to my question?

[ECSTuning]

Originally Posted by ashmostro

Any answers to my question?

:edit: What is the practical need for these other than damaged or bent factory arms? Is there real-world concern about the stock parts flexing?

Sorry bout that, my response must have not posted. Moral of the story for "real world" benefits, increased strength versus the factory steel arm. And all-around stiffer design exhibiting virtually no flex means more confident handling with no unintended geometry changes. Factory arms will flex and can cause interesting changes to the suspension geometry.

-James

[Yangorang]

Bought them on sale and just got them installed today!
https://www.ecstuning.com/ES2777155/

Here is my feedback:

These are great arms and they are very light and stiff - but there is one problem I found with the included bolt. If you look at the image I show the included bolt next to the stock bolt off of my vehicle and you can see it's clearly longer by a good deal. No matter how hard I tried I could not get that bolt in the same orientation as the original one - that little bit of extra added length makes it impossible to get a straight shot at the hole with the limited space available. I ended up just reusing the stock bolt with the new nut provided.

What's stranger is now that I look at it the installed pictures you guys have on the website clearly show the stock silver bolt instead of the black one provided with the kit. I would recommend simply providing the stock bolt to people for now in order to avoid issues. (I think the part is 07119906489)
Additionally I think one of the pictures shows one of the bolts in the wrong orientation - I'm honestly not sure why this would matter but the TIS procedure states to "note insertion direction of bolts" so I installed them the same way they came out.

Some tips for installation:
-You'll want an 18mm wrench and socket. I didn't happen to have an 18mm wrench handy so I used my crescent wrench but having the proper sized one would've been better.
-I found it a lot easier to remove the upper bolt first (one closer to the center of the vehicle) for some reason. The lower bolt just didn't want to come out first, but after removing the upper one it was much easier.
-When installing I found it easier to install the upper bolt first. The lower bolt then didn't want to really line up - I had to use a jack to help line it up best I could and then lightly tap the bolt through with a mallet.

[ECSTuning]

Thanks for the feedback Yangorang!

ECS Performance Rear Trailing Arms BMW E9X/E82/E88

[ECSTuning]

Back IN STOCK!