CST, MON to FRI. Fuel Injection Pressure Regulator. When it comes to the aftermarket, nobody does it better than Delphi Technologies. While many OEM suppliers put the aftermarket last, we routinely put it first, understanding customer lifetime value is often best delivered through the parts & service experience. Our lineup includes parts, equipment, software and training – all geared to put you a step ahead in servicing and maintaining sophisticated vehicle systems. We’ve got you covered with fuel systems, air conditioning, engine management, steering & suspension, advanced diagnostic equipment, e-catalogs and more.