Ford 3C3Z-9T517-AG Fuel Pressure Regulator "Blue Spring" Upgrade Kit

2003-2007 Ford 6.0L Powerstroke
Ford / Motorcraft
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The Ford 3C3Z-9T517-AG “Blue Spring” upgrade is a low-cost, must-have modification that will increase fuel pressure on your 6.0L Powerstroke. Even simple aftermarket performance upgrades can easily challenge the limits of your stock fuel system. Increasing the fuel pressure will help prevent damage to your injectors and even extend injector life. Common pressure increases can be 10-15PSI as well as increased engine performance, increased driveability and smoother power delivery. 

  • Easy Upgrade
  • Increased Injector Life
  • Increased Fuel Pressure
  • Great For Stock & Modified Trucks

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(231 Ratings, 1 Review) Average Rating:
Made it run like new again
scott mecham (Heyburn, ID) 11/13/2015 10:45 AM
Put the new spring kit in and made a noticeable difference. Seems like it runs quieter and has put some more spunk in her. order #421132