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Unipar LLC is an industry leader in the remanufacture of EMD power assemblies and related component parts to OEM specifications or better, the company says. Now a member of the Hilliard family of companies, Unipar has more than 50,000 locomotive parts to draw on and sell on an RTO, remanufactured or new basis. The company says its 30,000-square-foot facility in suburban St. Louis is dedicated to providing quality products that can be relied upon and delivered when needed.