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      02-19-2016, 12:07 PM   #7
Mr Rooty Von Tooty
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Drives: 2013 BMW 135i M-Sport
Join Date: Jul 2015
Location: Dayton, OH

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If you contact Bilstein's Tech Dept, they'll answer your questions which shock to use.

A big mistake people make is to choose a shock based up the road conditions or the ride they want. You pick the shock based upon the spring you are using. The damping of the shock should match the rate of the spring. If you use a lowering spring, it will be shorter in height and thus stiffer to prevent it from bottoming out and will require in most cases, the B8.

For example, my 2010 MB SLK with the Sport Pkg which has a half inch drop in the front will require the B8. BTW, what has been mentioned about the B8 being slightly shorter, compared to the B6, is also true at least for my Sport SLK. The non-sport SLK uses the B6.

To sum it up, if you retain the OEM suspension, you'll use the B6. If you use a lowering spring, then the B8.

BTW, another fact is the Bilsteins are guaranteed forever unless they come on the car as OEM!
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