Designed as a Type SV-1 Synchronizing Valve, this World American SSA 278825 unit operates at 42 PSI inlet pressure, delivering precise brake synchronization for heavy-duty truck and trailer systems. Built with 0.25-inch NPT control, delivery, and supply ports, this valve ensures optimal air flow and dependable performance in modern air brake applications. Features include 0.125" exhaust port, 28 PSI exhaust pressure, and reliable NPT thread type to match OE spec requirements for direct fitment. Engineered for compatibility with brake systems across Freightliner, Mack, Volvo, and more—ideal for air brake control in demanding on-road conditions. Includes one SV-1 valve assembly; replaces over 30 OE and aftermarket part numbers including Bendix 278825N, Automann 170.278825, and Meritor R955278825.