{"id":9970422251760,"title":"2001-2016 GM 6.6L Duramax Conical Valve Springs, Retainers, and Keepers Kit","handle":"valve-springs-retainers-keepers-kit-complete-kit","description":"\u003cp\u003eUpgraded conical spring kit for the 2001-2016 GM 6.6L Duramax. The conical valve springs with higher spring rate and the lighter weight of valve train components result in sharper response and eliminate valve float under high engine RPMs. These stiffer springs have an installed pressure of 125 pounds and handle 60+ psi of boost.\u003c\/p\u003e\n\u003cp\u003eThe spring retainers and seats are made of high-strength chromoly steel to handle the increased spring pressure. The FKM valve seals are tailored to the Cast Iron Heads’ valve guides for a tight seal.\u003c\/p\u003e\n\u003cp\u003eEach kit services two complete cylinder heads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32 springs\u003c\/li\u003e\n\u003cli\u003e32 spring retainers\u003c\/li\u003e\n\u003cli\u003e32 spring seats\u003c\/li\u003e\n\u003cli\u003e32 sets of keepers\u003c\/li\u003e\n\u003c\/ul\u003e","published_at":"2026-04-04T18:33:49-07:00","created_at":"2026-04-04T18:33:49-07:00","vendor":"Pacific Performance 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conical spring kit for the 2001-2016 GM 6.6L Duramax. The conical valve springs with higher spring rate and the lighter weight of valve train components result in sharper response and eliminate valve float under high engine RPMs. These stiffer springs have an installed pressure of 125 pounds and handle 60+ psi of boost.\u003c\/p\u003e\n\u003cp\u003eThe spring retainers and seats are made of high-strength chromoly steel to handle the increased spring pressure. The FKM valve seals are tailored to the Cast Iron Heads’ valve guides for a tight seal.\u003c\/p\u003e\n\u003cp\u003eEach kit services two complete cylinder heads.\u003c\/p\u003e\n\u003cp\u003e\u003cstrong\u003eKit Includes:\u003c\/strong\u003e\u003c\/p\u003e\n\u003cul\u003e\n\u003cli\u003e32 springs\u003c\/li\u003e\n\u003cli\u003e32 spring retainers\u003c\/li\u003e\n\u003cli\u003e32 spring seats\u003c\/li\u003e\n\u003cli\u003e32 sets of keepers\u003c\/li\u003e\n\u003c\/ul\u003e"}