European Car Magazine staff writer Pablo Mazlumian has been putting a RENNtech modified 2003 S600 rated at 650bhp through its paces and documenting the process for European Car Magazine. After upgrading to the RENNtech level 3 performance package, European car took the next logical step in the upgrade process and looked to tame all of the newly found torque. The December 2011 issue puts the RENNtech differential upgrade to the test. Read the complete article by clicking here:
Tags: article, differential, european car, level 3, os giken, press, s class, s600