Straight Valve Springs, Retainers, and Keepers Kit

Features:

• Direct fit for 6.6L Duramax engines
• Fits 2001-2016 Silverado HD models
• 85-90 lb installed spring pressure
• Improved valve response under boost
• Handles higher boost and RPM loads
• Chromoly retainers for superior strength
• Case-hardened components resist wear
• Precision FKM valve seals included
• Services two complete cylinder heads
• Complete kit with springs, retainers, keepers
• Includes spring seats for proper installation
• Ideal for performance and rebuild applications

Built To Handle Boost And Bring Confidence To Your Duramax Build

If 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.

Engineered Components That Improve Valve Control And Long Term Durability

At 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.

 Fitment: 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014, 2015, 2016 GM Silverado 2500HD/3500HD6.6L Duramax

Notes:

• Designed for PPE cast iron cylinder heads
• Not intended for stock cylinder head setups
• Supports higher boost and performance builds
• 85-90 lb spring pressure exceeds OEM specs
• Professional installation recommended for best results
• Proper valvetrain setup required for reliability
• Services two complete cylinder heads per kit
• Includes all necessary valvetrain hardware components
• FKM seals matched to specific valve guide design
• Ideal for engine rebuilds or head upgrades
• Verify compatibility before installation
• Built for durability in high stress applications