Restore proper fuel pressure and help protect your HEUI fuel injectors with the SWAG Performance Parts Fuel Pressure Regulator Blue Spring Upgrade Kit for 2003-2007 Ford 6.0L Powerstroke Diesel engines.
One of the most common issues on the 6.0L Powerstroke is inadequate fuel pressure caused by the factory regulator spring losing tension over time. Low fuel pressure can contribute to poor injector performance, hard starts, rough idle, reduced throttle response, and premature injector wear. The SWAG Blue Spring Upgrade is engineered to increase regulated fuel pressure by approximately 10 PSI, helping maintain the fuel pressure levels recommended for optimal injector operation.
Designed as a direct-fit replacement for the factory regulator components, this kit installs into the OEM fuel pressure regulator housing with no permanent modifications required. Whether your truck is completely stock or equipped with aftermarket tuning and performance upgrades, the SWAG Blue Spring Upgrade is one of the best preventative maintenance upgrades you can perform on a 6.0L Powerstroke.
Manufactured from premium-quality materials and precision-engineered for long service life, every kit includes the components needed for a clean, reliable installation.
Features & Benefits
- Increases regulated fuel pressure by approximately 10 PSI
- Helps protect expensive HEUI fuel injectors from low fuel pressure conditions
- Improves throttle response and overall drivability
- Supports injector longevity and fuel system reliability
- Direct replacement for factory fuel pressure regulator components
- No cutting or permanent modifications required
- Ideal for stock, towing, daily driven, and performance applications
- Precision-manufactured components for OE-quality fit and function
Vehicle Fitment
Ford Super Duty
- 2003 Ford F-250/F-350/F-450/F-550 6.0L Powerstroke Diesel
- 2004 Ford F-250/F-350/F-450/F-550 6.0L Powerstroke Diesel
- 2005 Ford F-250/F-350/F-450/F-550 6.0L Powerstroke Diesel
- 2006 Ford F-250/F-350/F-450/F-550 6.0L Powerstroke Diesel
- 2007 Ford F-250/F-350/F-450/F-550 6.0L Powerstroke Diesel
Ford Excursion
- 2003-2005 Ford Excursion 6.0L Powerstroke Diesel
Ford E-Series
- 2004-2007 Ford E-350/E-450 6.0L Powerstroke Diesel
Kit Includes
- Blue fuel pressure regulator spring
- Regulator housing
- O-rings and seals
- Installation hardware
Why Upgrade to the Blue Spring?
The factory fuel pressure regulator is known to allow fuel pressure to drop below ideal operating levels as components age. The Blue Spring Upgrade helps maintain proper fuel pressure, promoting improved injector lubrication and reducing the risk of injector damage caused by fuel starvation. It is widely considered one of the most worthwhile reliability upgrades for any 6.0L Powerstroke owner.
OEM / Interchange Numbers
- 3C3Z-9T517-AG
- 3C3Z-9T517-AA
- 3C3Z-9T517-AD
- 3C3Z-9T517-AE
- 4C2Z-9T517-AA
- 4C2Z-9C968-A
- Dorman 904-490
- Dorman 904-239
- R81001
