Ferrea Dual Spring Valve Springs (24) for Nissan 300ZX 3.0L VG30DT/VG30DTT 1990 - 96 (FVS10039-24)FERREA NISSAN 300ZX VG30DETT 20. 8mm OD, 15. 3mm ID, 80lbs Seat Press, 200lbs Open Press, 22mm Coil Bind Part Number: FVS10039 24 Our new Ferrea Valve Springs are processed with premium grade alloy and feature special thermal treatment. Our advanced spring design and material specifications, have uniform load and stress distribution even in the most extreme racing environment This new valve spring offers customers additional durability in all high