Fitment：For Predator For Animal Engine Builders This is for a set of dual valve springs (a total of 4 separate springs) Approximately 32 lbs at 0.925" and 42.5 lbs at 0.825" installed height. These valve springs are ideal for use with mild DynoCam grinds such as the 275, 308, MOD1, and 315, with up to 0.315" lift. Commonly referred to as our 32 lb spring, it helps maintain consistent valve control and prevents float at moderate RPM ranges.