They won't 'break' anything. However, if you are going with stock springs/shocks, and the Eibach setup, really think about installing both front and rear bars. The rear bar alone could lead to some dangerous handling traits, in my opinion.
January 2008 Focus Fanatics ROTM
2003 Ford Focus ZX3 2.3l N/A = 221 HP, 162 ft-lbs, firstname.lastname@example.orgMPH
2006 Ford Fusion 2.3l Turbo = 244HP, 247ft-lbs
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