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BMW 3-Series (E90 E92) Forum > E90 / E92 / E93 3-series Technical Forums > Suspension | Brakes | Chassis > E90 M3 Springs on 335i?



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      11-09-2014, 08:43 PM   #1
litercola
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E90 M3 Springs on 335i?

Tried searching did not find any specific information about fitment and function.

Wondering whether E9x M3 springs will fit an E90 335i? If anyone has experience or links to more information please post.

The hypothetical intent would be to mate the M3 springs with koni adjustables to a 2011 335xi along with dinan camber plates. Just trying to understand if the springs will fit and what the impact on ride height would be. I am also weighing other spring options but this post in specifically to understand the feasibility of the M3 springs.

Thanks in advance.
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      11-09-2014, 10:31 PM   #2
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Top mount for the Front spring I think is different and the spring may not fit the XI/nonXI top mount.

For some reason a thread here or in 1addicts asked same question.
I haven't seen any alternative scenarios - always M3 top mount + m3 springs

see the XI section. But over all, spending money to change Shocks, you are just minutes away from changing the springs anyway, so find a HR or Eibach XI spring
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      11-09-2014, 11:05 PM   #3
litercola
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Good info and more to investigate.

Looking for a mild drop with higher spring rate hence the M3 springs. Also considering sport springs, BMW performance and Dinan.

Thanks
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      11-09-2014, 11:24 PM   #4
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I seem to recall someone fitting them to a non xi and the ride height was all messed up due to differences in weight.
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      11-09-2014, 11:28 PM   #5
litercola
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Had read the same...something like +1" of ride height
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      11-10-2014, 07:56 AM   #6
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Quote:
Originally Posted by litercola View Post
Good info and more to investigate.

Looking for a mild drop with higher spring rate hence the M3 springs. Also considering sport springs, BMW performance and Dinan.

Thanks
Be careful with this, this XI spring rate is already a lot higher than non XI sport, or eibach pro kit and similar. The H&R sport is stiffer, or about as stiff, and gives a good drop but people complain about it being too stiff. BMWPS may be another option (from non XI) but I have no experience with them. Lowering an XI without coil overs is not very straight-forward.
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      11-10-2014, 12:43 PM   #7
litercola
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totally agreed on lowering xi models and hence wanting to avoid lowering springs. Only looking at springs that will lower an inch or less (sport, BMW performance, dinan, and perhaps m3 but now shying away from the m3 option).

As you noted the spring rates on the xi are basically equivalent to the sport spring rates, I am also considering keeping the stock springs and just replacing the struts with koni adjustable.

thanks for all the responses
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