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E46 Xi Forum
The E46 XI was produced from 01-05 in sedan and touring body styles. Powered by either a 2.5L inline 6 in the 325xi or a 3.0L inline 6 330xi. Discuss all thing about BMW AWD E46 'Xi' here.

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Old 06-22-2011, 12:29 AM   #1
tnhl1989
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Dropping the XI

So I'm getting Bilstein Sports and looking at H&R springs. The only thing besides replacing the mounts. Are there any other parts I should consider as well?

I was looking at the foam shock absorbers and the shock shields. Do I need those too?

Looking at bavauto it says it's not required for lowering.
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Old 06-22-2011, 09:32 AM   #2
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You don't need them but if you can then go ahead and replace them. It certainly can't hurt.

BTW what made you want to go with that set up?
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Old 06-22-2011, 09:48 AM   #3
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Sounds like you have a fairly complete list of things to replace...

You might also consider new front and rear shock mounts. We have everything needed available below...

Click HERE for more information.




Please let us know if you have any questions! Feel free to shoot me a PM or email.

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Old 06-22-2011, 10:35 AM   #4
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H&R is a bad choice. Go with eibach springs.
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Old 06-22-2011, 10:42 AM   #5
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What are the difference of the springs? I see they have the same drop.

I thought about that set up since most people have done it as well.
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Old 06-22-2011, 10:45 AM   #6
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Originally Posted by tnhl1989 View Post
What are the difference of the springs? I see they have the same drop.

I thought about that set up since most people have done it as well.
It's going to ride very harsh. Even though it says you get the same, you actually get more drop with the H&R as opposed to the Eibach.
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Old 06-22-2011, 10:57 AM   #7
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+1. No personal experience...but the XI board is loaded with people who feel the H&Rs are wayyyyy too firm of a ride.
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Old 06-22-2011, 11:30 AM   #8
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Oh interesting. Didn't see that coming. Any clue on the spring rate for those springs?
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Old 06-22-2011, 11:44 AM   #9
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I have H&R sports and I think they are fine. I definitely feel potholes and bumps but its not like im bouncing out of my seat or something. If you do a search there are a few other topics with this same argument
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Old 06-22-2011, 11:50 AM   #10
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I am most likely going to autocross the car anyways. So I would assume the firmer ride (H&R) would be better for autocross as well?
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Old 06-22-2011, 11:57 AM   #11
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I had H&R's for while and they were pretty harsh. Didn't bother me at first, but after awhile it got to be annoying.

I plan on picking up Eibachs in the next few weeks with Mechunik Front Spring Perches and a 5mm spring pad in the back to give it a bit more of a drop. Its all really based on what your looking for, if you want to sip coffee on the way to work then H&R's are not for you, but if you want a nice drop and firmer ride they are perfect.
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Old 06-22-2011, 01:09 PM   #12
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I am most likely going to autocross the car anyways. So I would assume the firmer ride (H&R) would be better for autocross as well?
I am going to quote what I said in the other thread going about this called "slamming the xi" or something like that. While some of what I'm quoting doesn't apply to your question, it is still worth your consideration:

Quote:
Originally Posted by SamDoe1 View Post
Keep the CV boots in good order and you'll be fine. The only thing to worry about when you "slam" a car is the change in how the chassis handles the forces. When you lower it significantly, you have to increase the spring rates because you have to accomodate the reduced suspension travel while still supporting the vehicle. Because of this, more force is transferred to the shock mounts/shock towers because the springs are not absorbing as much of it. So be sure to consistently check those items for wear and/or failure.

Also, lowering a car just for looks isn't going to automatically give you spectacular handling. An auto maker spends countless hours of engineering time in chassis and suspension dynamics to tune a specific suspension to a specific chassis in order to guarantee that it will work, work well, and work safely for thousands of miles. I can assure you that many, if not all, aftermarket companies do not invest nearly as much time into a project that an automaker will and I can guarantee that you won't either from a suspension tuning standpoint. Racing teams who use upgraded suspension components also invest that time to tune the new suspension for the appropriate use.

With that said, "slamming" a car is not impossible and chances are that it won't destroy your suspension/drive train. But you are drastically changing the suspension dynamics of your car and you should be aware of how those changes will alter the behavior and characteristics of how the car drives.
What I'm trying to say here is that just because your ride is firmer/lower does not in any way, shape, or form mean that your performance will be better. It could very well be worse or even unstable. Please evaluate what you want to get out of a suspension change before doing it just for kicks.
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Old 06-22-2011, 01:20 PM   #13
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Thanks a lot for that information. Of course I am not doing it just for kicks but also for improvements. I have done a good amount of research already on everything.
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