The .585” Lift COMP Cams Beehive Valve Spring Kits for GM 6.6L Duramax Diesel Engines include everything needed to upgrade from stock springs: Beehive Valve Springs, steel retainers, spring seats and valve seals. Beehive Valve Springs feature a reduced diameter at the top of the spring to allow the use of a smaller and lighter retainer, reducing overall valve train weight. The lighter valve train combined with the stronger spring allows the engine to rev higher without concerns of valve float while an increased spring rate maintains valve train stability at elevated RPM to allow the use of more aggressive camshafts. The unique ovate Beehive shape not only has higher load but is more dynamically stable than the factory spring, ensuring valve train stability at elevated RPM and boost pressures.
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This Part Fits:

Year	Make	Model	Submodel
2001-2005	Chevrolet	Silverado 2500 HD	Base
2001-2005	Chevrolet	Silverado 2500 HD	LS
2001-2005	Chevrolet	Silverado 2500 HD	LT
2004-2005	Chevrolet	Silverado 2500 HD	WT
2001-2005	Chevrolet	Silverado 3500	Base
2001-2005	Chevrolet	Silverado 3500	LS
2001-2005	Chevrolet	Silverado 3500	LT
2004	Chevrolet	Silverado 3500	WT
2002-2005	GMC	Sierra 2500 HD	Base
2001-2002	GMC	Sierra 2500 HD	SL
2001-2005	GMC	Sierra 2500 HD	SLE
2001-2005	GMC	Sierra 2500 HD	SLT
2003-2005	GMC	Sierra 2500 HD	WT
2002-2005	GMC	Sierra 3500	Base
2001-2002	GMC	Sierra 3500	SL
2001-2005	GMC	Sierra 3500	SLE
2001-2005	GMC	Sierra 3500	SLT
2004-2005	GMC	Sierra 3500	WT