New diesel engine designs require a common rail accumulator that can be adapted to a variety of customer needs. Tighter emissions regulations and changing consumer preferences have resulted in an increasing demand for Senior's diesel common rail technology in both the North American and European markets.

Senior has developed rail both forged and welded rail designs for vehicles ranging in size from small cars to heavy duty trucks and off-road engine applications.

Together with its high pressure fuel lines, Senior can provide full system design and manufacturing capabilities, providing improved seal reliability and reduced warranty costs.