Home / Twin Star Cars Products / Twin Star Cars O Scale Products / Twin Star Cars O Scale Detail Parts / PS2 Conversion Bolsters with Coupler Pocket (Brass) PS2 Conversion Bolsters with Coupler Pocket (Brass)$26.00 These parts were designed to convert the Atlas PS2 4427 hoppers. They can be modified to use them on any PS2 hopper. Purchase Information Categories: Twin Star Cars O Scale Detail Parts, Twin Star Cars O Scale Products, Twin Star Cars Products Related products Twin Star Cars O Scale Detail PartsTwin Star Cars O Scale Products Spark Arrestors Spark arrestors used on Rock Island GP and F units. Twin Star Cars O Scale Detail PartsTwin Star Cars O Scale Products Rock Island Heralds Twin Star Cars O Scale Detail PartsTwin Star Cars O Scale Products SW/NW Headlight Castings (Single Lens) Castings are to replace the ones on the Oriental SW-1 and NW-2. Can be used for other models. Twin Star Cars O Scale Detail PartsTwin Star Cars O Scale Products SW/NW Headlight Castings (Dual Lens Pyle) Castings are to replace the ones on the Oriental SW-1 and NW-2. Can be used for other models.