MEMPHIS, Tenn.–(BUSINESS WIRE)–Highline Warren, a leader in manufacturing and distribution of automotive maintenance products, announced that it has acquired the assets of the Sapp Bros. diesel exhaust fluid (DEF) division. Sapp Bros. is a leading regional DEF provider from its Omaha, Neb. facility. DEF is an essential ingredient that works to remove impurities from modern diesel exhaust systems, resulting in cleaner emissions and improved fuel economy. “We are excited to add the Sapp. Bros.