2001-2016 GM 6.6L Duramax Valve Springs, Retainers, and Keepers Complete Kit " Disaster Kits The Super 40 has that

The Super 40 has that deep powerful sound of the Original 40 series but with all the benefits of performance and low interior resonance from the Delta Flow&reg technology

Banks Power

This handy item not only keeps you legal in states that require front plates

Improved Filter Performance

STREET/STRIP Provides positive shifts for high performance street use or for competitive events

2001-2016 GM 6.6L Duramax Valve Springs, Retainers, and Keepers Complete Kit " Disaster Kits The Super 40 has thatThe 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