This gear is essential when building a 2L stroker conversion for a 1.8t using the factory 2.0 FSi Forged Crankshaft. The factory gear is not available in North America and thus must be imported at considerable cost. We got sick of this situation, and sick of paying $50+ per gear, so we reverse engineered them and had a large batch made from carburized steel. Installation is the same as the factory piece, pull the FSi one off using a 3 jaw puller, heat the new one until very hot with a torch, and then simply slide into place on the crank snout. The large chamfer on the inside diameter goes on the "inside" facing the cylinders.