{"product_id":"ppe-110090053-straight-valve-springs-retainers-and-keepers-kit-2001-2016-gm-silverado-2500hd-3500hd6-6l-duramax","title":"PPE 110090053 Straight Valve Springs, Retainers, and Keepers Kit | 2001-2016 GM Silverado 2500HD\/3500HD6.6L Duramax","description":"\u003cp\u003e\u003cstrong\u003eFeatures:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDirect fit for 6.6L Duramax engines\u003c\/li\u003e\n\u003cli\u003eFits 2001-2016 Silverado HD models\u003c\/li\u003e\n\u003cli\u003e85-90 lb installed spring pressure\u003c\/li\u003e\n\u003cli\u003eImproved valve response under boost\u003c\/li\u003e\n\u003cli\u003eHandles higher boost and RPM loads\u003c\/li\u003e\n\u003cli\u003eChromoly retainers for superior strength\u003c\/li\u003e\n\u003cli\u003eCase-hardened components resist wear\u003c\/li\u003e\n\u003cli\u003ePrecision FKM valve seals included\u003c\/li\u003e\n\u003cli\u003eServices two complete cylinder heads\u003c\/li\u003e\n\u003cli\u003eComplete kit with springs, retainers, keepers\u003c\/li\u003e\n\u003cli\u003eIncludes spring seats for proper installation\u003c\/li\u003e\n\u003cli\u003eIdeal for performance and rebuild applications\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003ch4\u003eBuilt To Handle Boost And Bring Confidence To Your Duramax Build\u003c\/h4\u003e\n\u003cp\u003eIf you are putting together a Duramax that needs to hold power without compromise, this PPE valve spring kit is the kind of upgrade that makes a real difference the moment you fire it up. Designed to work seamlessly with 2001-2016 6.6L Duramax engines, it delivers the kind of consistent valve control that helps your truck stay responsive under load. The 85-90 lb installed pressure gives you a noticeable improvement in how the engine reacts, especially when you start leaning into boost. Additionally, the stronger spring design helps prevent valve float, which is critical when pushing your setup harder than stock. This means smoother power delivery and more confidence when towing, daily driving, or stepping into performance territory. The included retainers, seats, and keepers make this a complete solution, so you are not chasing down extra parts during install. It is a straightforward upgrade that supports both reliability and performance where it matters most.\u003c\/p\u003e\n\u003ch4\u003eEngineered Components That Improve Valve Control And Long Term Durability\u003c\/h4\u003e\n\u003cp\u003eAt the core of this kit is a carefully matched set of components built to handle the demands of modern diesel performance. The straight valve springs are calibrated to provide consistent 85-90 lb seat pressure, which improves valve stability and helps maintain precise timing under higher RPM and boost conditions. Furthermore, the retainers and seats are constructed from case-hardened chromoly steel, giving them the strength to resist deformation and long term wear in high stress environments. The inclusion of FKM valve seals ensures a tight and reliable seal at the valve guides, which helps control oil consumption and maintain proper lubrication. Each kit is designed to service two complete cylinder heads, making it ideal for full builds or head upgrades using PPE cast iron cylinder heads. What is more, the balanced combination of materials and spring pressure helps extend valvetrain life while supporting increased performance demands. This level of engineering gives you the confidence that your valvetrain is ready for both daily use and high output applications.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003e Fitment: \u003c\/strong\u003e2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado 2500HD\/3500HD6.6L Duramax\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eNotes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003eDesigned for PPE cast iron cylinder heads\u003c\/li\u003e\n\u003cli\u003eNot intended for stock cylinder head setups\u003c\/li\u003e\n\u003cli\u003eSupports higher boost and performance builds\u003c\/li\u003e\n\u003cli\u003e85-90 lb spring pressure exceeds OEM specs\u003c\/li\u003e\n\u003cli\u003eProfessional installation recommended for best results\u003c\/li\u003e\n\u003cli\u003eProper valvetrain setup required for reliability\u003c\/li\u003e\n\u003cli\u003eServices two complete cylinder heads per kit\u003c\/li\u003e\n\u003cli\u003eIncludes all necessary valvetrain hardware components\u003c\/li\u003e\n\u003cli\u003eFKM seals matched to specific valve guide design\u003c\/li\u003e\n\u003cli\u003eIdeal for engine rebuilds or head upgrades\u003c\/li\u003e\n\u003cli\u003eVerify compatibility before installation\u003c\/li\u003e\n\u003cli\u003eBuilt for durability in high stress applications\u003c\/li\u003e\n\u003c\/ul\u003e","brand":"PPE","offers":[{"title":"Default Title","offer_id":53997588283676,"sku":"PPE110090053","price":539.99,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0738\/2279\/8108\/files\/Straight-Valve-Springs-Retainers-Keepers-Kit-GM-6-6L-Duramax-2001-2016_110090053_01.webp?v=1774280260","url":"https:\/\/www.alligatorperformance.com\/products\/ppe-110090053-straight-valve-springs-retainers-and-keepers-kit-2001-2016-gm-silverado-2500hd-3500hd6-6l-duramax","provider":"Alligator Performance","version":"1.0","type":"link"}