V-Thunder/Competition Cam DS1001 Dual Valve Spring Kit

Springs are made from super-clean, stress relieved chrome silicon wire. Provide excellent durability and resistance to load loss when using aggressive camshaft profiles. Includes unique 10deg. super keys and retainers. Wider key angle ensures a stronger assembly vs. the OEM 7deg. keeper angle. High-strength chromoly retainers. 685in. lift capable spring assembly. Kit fits 5/16in. valve stems. 184 lb. at 1.850in. , 443 lb. at 1.230in. , 1.510in. OD .745in. Id. Made in the USA.