Original Ferrari 288 GTO engine crankshaft half bearing. Very good used condition. 28mm width. We believe this to be the "lower half bearing," Ferrari part # 100122, 100123, or 100124. If so, it would also fit most or all variants of the 308, 328, Mondial, 348, 365 GT4 BB, 400i, 412, 512 BB, 512 BBi, Testarossa, and F40.