AMS Racing .560" Lift Value Valve Springs Kit for GM Gen III IV 4.8 5.3 6.0 Enginesset of 16 fits GEN III IV LS style engines (4. 8L, 5. 3L, 5. 7L, 6. 0L, 6. 2L) 100 lbs @ 1. 800"; 300 lbs @ 1. 240" beehive design includes retainers, locks, and top hat valve stem seals
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AMS Racing .560" Lift Value Valve Springs Kit for GM Gen III IV 4.8 5.3 6.0 Engines