Fall-Line Motorsports V2 Front Mono Ball Conversion Kit - E9X M3 / E82 1MMADE IN THE USA. Fall Lines mono ball spherical bearing conversion kit transforms the front steering and suspension feel of the M3. The factory rubber bushing is very large and is prone to substantial deflection under load as the M3 is put through its paces. Deflection of the bushing can create unwanted geometry change, steering wobble under braking, and even hysteresis of the thrust arm. The bearings housing is a precision machine made from aluminum