2001-2016 GM 6.6L Duramax Straight Valve Springs, Retainers, and Keepers Kit

This kit includes straight valve springs, retainers, seats, and keepers for PPE Cast Iron Cylinder Heads, designed to handle higher boost.

• The springs offer higher responsiveness and better boost handling.
• The retainers and seats are made of case-hardened high-strength chromoly steel.
• The FKM valve seals are tailored to the Cast Iron Heads’ valve guides.