The 3102-270 Flange Yoke, a 1310 series part, fits BMW 100mm and SAE 47mm applications. It features a 3.937″ OD, 1.850″ male pilot, and 4 flange holes with a 2.34″ x 2.34″ hole spacing. The yoke accommodates universal joints measuring 1.062″ x 3.219″