Application: Ford 2003 - 2007 F-250, F-350, F-450, F-550 6.0L Powerstroke Diesel Part Number: ISK627 Diesel Bostech Fuel Blue Spring Upgrade & Seal Kit This kit has the blue spring which will increase your fuel rail pressure approximately 10psi. Free Shipping Feel Free to Contact Us with Any Questions or Concerns at: (850)250-2132
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