The valve spring, spring seat/retainer/keeper kit comes installed with each PPE Duramax Cast Iron Cylinder head. The tapered valve springs' higher spring rate and lighter valve train weight enable faster response during higher RPMs and eliminate valve float. Premium chromoly material construction ensures the longevity and durability of valve seats, retainers, and keepers.

Kit Includes:

• 32 springs
• 32 spring retainers
• 32 spring seats
• 32 sets of keepers