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      02-08-2013, 08:29 AM   #1
dmw16
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Drives: 2005 ///M3
Join Date: Aug 2010
Location: Maryland

Posts: 931
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Hypercoil or Swift Springs w/o Coilovers

Currently on my E46 M3 I have Billstein HD shocks and Eibach springs. I bought the setup upon discovery that my factory rear spring had broken and at the time hadn't really thought about track-duty.

I am now getting my car ready for track-duty as a more primary focus (it's not my DD) and I'm wondering if I'd do well to upgrade/change-out the Eibach springs with a set of linear springs like Hypercoil or Swift?

If so, how do I go about selecting spring rates, length, etc?

Thanks.
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