WABCO part numbers starting 578

578088	Spring, actuating piston (valve, a-1 charging cutoff pilot)	WABCO
578322	Fitting, 90-degree elbow, weld (sand system piping)	WABCO
578336	Valve (valve, check, rubber seated)	WABCO
578773	Discharge valve	WABCO

Not listed? Add it yourself.