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  #23  
Old 07-07-2012, 04:58 PM
Bmwmastertech Bmwmastertech is offline
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Location: Seacoast NH
 
Join Date: Jul 2012
Posts: 28
Mein Auto: E34 M5, X3 3.5, E39 530i
Hartge makes the piggy back module for the N55. I also suggest h and r springs. It rides better and more stable. Make sure you do an alignment afterwards.
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