{"product_id":"excelfu-6-0-blue-spring-upgrade-for-ford-powerstroke-2003-2007-f-250-f-350-f-450-f-550","title":"EXCELFU 6.0 Blue Spring Upgrade for Ford Powerstroke 2003-2007 F-250\/F-350\/F-450\/F-550","description":"\u003ch2\u003eUpgrade your 6.0 Powerstroke fuel system\u003c\/h2\u003e\n\u003cp\u003eElevate the performance of your Ford 6.0L Powerstroke with the EXCELFU 6.0 Blue Spring Upgrade Kit. This upgrade replaces Ford part 3C3Z-9T517-AG and is designed for 2003–2007 F-Series Super Duty trucks as well as the 2003–2005 Excursion. Built to complement the way you use your truck, this kit aims to deliver a steadier fuel rhythm and a cleaner install path without altering other components.\u003c\/p\u003e\n\u003ch3\u003eWhat’s in the kit\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003e1 upgraded blue stainless steel spring\u003c\/li\u003e\n  \u003cli\u003e1 fuel pressure regulator housing\u003c\/li\u003e\n  \u003cli\u003e4 rubber O-ring seals\u003c\/li\u003e\n  \u003cli\u003e4 bolts\u003c\/li\u003e\n  \u003cli\u003e3 orifice seals\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eKey benefits you may notice\u003c\/h3\u003e\n\u003cul\u003e\n  \u003cli\u003eIncrease fuel pressure by 10–15 psi, supported by the kit’s design\u003c\/li\u003e\n  \u003cli\u003ePotentially longer injector life through more stable fuel regulation\u003c\/li\u003e\n  \u003cli\u003eAll-in-one upgrade with a focus on fit and durability\u003c\/li\u003e\n  \u003cli\u003eBlue stainless steel spring adds a tactile, durable touch to the fuel system\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch3\u003eCompatibility and fit\u003c\/h3\u003e\n\u003cp\u003eThe upgrade targets Ford 6.0L Powerstroke engines across the listed models: 2003–2007 F-250, F-350, F-450, F-550 Super Duty, and 2003–2005 Excursion. It is designed to install with common hand tools and includes every component needed for a complete replacement, reducing the need to source separate parts.\u003c\/p\u003e\n\u003ch3\u003eEasy installation and real-world use\u003c\/h3\u003e\n\u003cp\u003eDesigned for a straightforward install that can be completed in minutes, the kit ships with all accessories in one box. In daily driving, you might notice a steadier fuel response during quick throttle changes and under load, while highway cruising could feel more consistent as operating pressure remains stable under varying conditions.\u003c\/p\u003e\n\u003ch3\u003eQuality and purpose\u003c\/h3\u003e\n\u003cp\u003eCrafted with a corrosion-resistant blue spring and durable housing, this kit focuses on reliable operation and a clean engine bay appearance. It provides a targeted upgrade path for drivers who want to explore potential improvements in fuel regulation and system behavior, without implying guaranteed results.\u003c\/p\u003e\n\u003csection class=\"product-faq-snippet\"\u003e\u003ch3\u003eFAQ\u003c\/h3\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: Is this kit compatible with all 6.0L Powerstroke models?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Fits 2003–2007 Ford 6.0L Powerstroke F-250, F-350, F-450, F-550, and 2003–2005 Excursion.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"faq-item\"\u003e\n\u003cp class=\"faq-q\"\u003eQ: What’s included and how easy is the installation?\u003c\/p\u003e\n\u003cp class=\"faq-a\"\u003eA: Includes blue spring upgrade, regulator housing, O-rings, bolts, and seals; designed for quick install with standard hand tools.\u003c\/p\u003e\n\u003c\/div\u003e\u003c\/section\u003e","brand":"EXCELFU","offers":[{"title":"Default Title","offer_id":42468583538773,"sku":"B07CNCPTN5","price":38.84,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0632\/3270\/4597\/files\/excelfu-6-0-blue-spring-upgrade-kit.jpg?v=1778077825","url":"https:\/\/plentytorque.co.uk\/products\/excelfu-6-0-blue-spring-upgrade-for-ford-powerstroke-2003-2007-f-250-f-350-f-450-f-550","provider":"PlentyTorque","version":"1.0","type":"link"}