65lb Dual Valve Spring For Predator 420cc GX240 GX270 GX270 GX340 GX390 Engine
(For Predator 420cc Fo GX240 GX270 GX270 GX340 GX390 Engine. 375 lift). A set of dual valve springs (A total of 4 separate springs). ✔ Stainless steel valves and billet or titanium retainers are required.