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      11-24-2010, 05:21 PM   #4
MJR63
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Drives: 2011 335i X-Drive Sedan
Join Date: Sep 2010
Location: Tolland, CT

Posts: 415
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I went with the AST 4100 and Harold at HP Autowerks because I like the flexibility of adding the right spring for your driving needs. After tons of research I decided to go with the AST 4100's because they are well built and have a great reputation. It is a custom order and takes 4 - 6 weeks but to me it is worth it! I plan to post pics of the install process and reviews after I try them....I'm going with 336lbs springs in the front and 672lbs in the rear. The stock 335 has 145lbs front and 460lbs rear. You could go with 400lbs in the front and 784lbs in the rear but those are more for real track use....
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