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7.3 OBS Powerstroke IPR Valve – Grizzly GA33401
Restore reliable high-pressure oil control and injector performance on your early 7.3L Powerstroke with the Grizzly GA33401 Injection Pressure Regulator (IPR) Valve.
This direct-fit replacement is designed specifically for 1994–1995.5 Ford 7.3L Powerstroke (OBS) and corresponding early Navistar T444E engines. The IPR valve regulates high-pressure oil from the HPOP that actuates the HEUI injectors. When it sticks, leaks, or fails to hold proper pressure, you can experience hard starts (especially hot), rough idle, surging, power loss, stalling, or no-start conditions.
The Grizzly GA33401 is engineered as a quality OE-style replacement that meets or exceeds original specifications for accurate pressure regulation and long-term durability in demanding diesel service.
Key Features
- Precision regulation of high-pressure oil for consistent injector actuation and proper Injection Control Pressure (ICP)
- Direct-fit design — installs like the original with no modifications
- Built for the unique early (pre-1995.5) IPR configuration used on OBS 7.3 Powerstrokes
- Helps restore smooth idle, reliable starting, and peak engine efficiency
Fits 1994–1995.5 Ford 7.3L Powerstroke (OBS) Early Navistar T444E applications (verify by original part number or engine serial)
Common Cross References AP63401, 2C3Z-9C968-BA, F4TZ-9C968-C / F4TZ-9C968-B, 1824982C91, 1833798C91, 1841279C91
Warranty 1 Year
A failing IPR is one of the most common causes of drivability issues on early 7.3s. Replacing it with the Grizzly GA33401 is a straightforward way to restore proper high-pressure oil system function and keep your classic OBS Powerstroke running strong.
7.3 OBS Powerstroke IPR Valve – Grizzly GA33401
Restore reliable high-pressure oil control and injector performance on your early 7.3L Powerstroke with the Grizzly GA33401 Injection Pressure Regulator (IPR) Valve.
This direct-fit replacement is designed specifically for 1994–1995.5 Ford 7.3L Powerstroke (OBS) and corresponding early Navistar T444E engines. The IPR valve regulates high-pressure oil from the HPOP that actuates the HEUI injectors. When it sticks, leaks, or fails to hold proper pressure, you can experience hard starts (especially hot), rough idle, surging, power loss, stalling, or no-start conditions.
The Grizzly GA33401 is engineered as a quality OE-style replacement that meets or exceeds original specifications for accurate pressure regulation and long-term durability in demanding diesel service.
Key Features
Precision regulation of high-pressure oil for consistent injector actuation and proper Injection Control Pressure (ICP)
Direct-fit design — installs like the original with no modifications
Built for the unique early (pre-1995.5) IPR configuration used on OBS 7.3 Powerstrokes
Helps restore[...]
7.3 OBS Powerstroke IPR Valve – Grizzly GA33401
Restore reliable high-pressure oil control and injector performance on your early 7.3L Powerstroke with the Grizzly GA33401 Injection Pressure Regulator (IPR) Valve.
This direct-fit replacement is designed specifically for 1994–1995.5 Ford 7.3L Powerstroke (OBS) and corresponding early Navistar T444E engines. The IPR valve regulates high-pressure oil from the HPOP that actuates the HEUI injectors. When it sticks, leaks, or fails to hold proper pressure, you can experience hard starts (especially hot), rough idle, surging, power loss, stalling, or no-start conditions.
The Grizzly GA33401 is engineered as a quality OE-style replacement that meets or exceeds original specifications for accurate pressure regulation and long-term durability in demanding diesel service.
Key Features
- Precision regulation of high-pressure oil for consistent injector actuation and proper Injection Control Pressure (ICP)
- Direct-fit design — installs like the original with no modifications
- Built for the unique early (pre-1995.5) IPR configuration used on OBS 7.3 Powerstrokes
- Helps restore smooth idle, reliable starting, and peak engine efficiency
Fits 1994–1995.5 Ford 7.3L Powerstroke (OBS) Early Navistar T444E applications (verify by original part number or engine serial)
Common Cross References AP63401, 2C3Z-9C968-BA, F4TZ-9C968-C / F4TZ-9C968-B, 1824982C91, 1833798C91, 1841279C91
Warranty 1 Year
A failing IPR is one of the most common causes of drivability issues on early 7.3s. Replacing it with the Grizzly GA33401 is a straightforward way to restore proper high-pressure oil system function and keep your classic OBS Powerstroke running strong.
Fits: 7.3 Powerstroke 1994-2003