Tool Steel Heavy Duty Valve Spring RetainersPast 4,500 rpm — especially behind a high-lift camshaft — the factory retainer becomes the weak link in the valvetrain. These tool steel retainers are built for that load and work with any Hamilton 24-valve spring.Key Features Built for 4,500+ rpm operation Reduced mass for precise valve control behind aggressive cam profiles Tool steel construction — substantially stronger than stock Works with any Hamilton Dodge 24-valve spring Good to Know Hamilton specifies these retainers whenever the 110 lb competition springs are used Locks are not included Cams running over .370" lobe lift warrant titanium retainers instead Fitment1998.5–2007 Dodge Ram 5.9L Cummins 24-valve and 2007.5–2018 Ram 6.7L Cummins running Hamilton 24-valve spring packages.
