The injection pressure regulator (IPR) valve controls injection control pressure in the HEUI fuel systems found on engines like the Ford Powerstroke 6.0L and 7.3L and the Navistar/International DT466. A failing IPR valve causes hard starts, low power, and pressure-related codes. We stock OEM-brand IPR valves from manufacturers including Bosch and Alliant Power, many with no core charge and free shipping on orders over $1,000. Confirm the correct part number against your engine's OEM cross-reference before ordering.