Experiment To Find Centre Of Gravity at Greg Booth blog HOW TO FIND THE CENTER OF GRAVITY OF A LAMINA YouTube Determining the Centers of Gravity of Regular and Irregular Shapes PPT Turning Forces and Centre of Gravity PowerPoint Presentation. Bluestuff NDX is a high friction sport and race material that can be used for aggressive street driving and certain types of track use. The material has had much success on the track with quality aftermarket calipers (Multi piston systems with better release and cooling and larger rotors) and limited success with street based calipers where pad size and caliper drag can challenge any brake material. The biggest advantage of EBC Bluestuff NDX is their bite from cold and progressive brake feel and the ability to bring a car to a complete stop. This has led to the ECE R90 brake safety regulation approval of R90 which is now completed and certificates are being obtained (during July 2011). There are certain older street based caliper systems where even the new Bluestuff will have trouble handling the caliper and slider drag inherent in the systems but this scenario is exactly the same for our competitors. There is NO material that will be PERFECT on the track in all older street based caliper systems. This Part Fits: Year Make Model Submodel 2002 2003,2008 2009 Porsche 911 GT2 2004 2005,2007 2008 Porsche 911 GT3 2007 2008 Porsche 911 GT3 RS 2007 2014 Porsche 911 Turbo 2011 2014 Porsche 911 Turbo S