Platinum LT1 Dual Spring Kit .660in Lift Gen V

Platinum LT1 Dual Spring Kit .660in Lift Gen V Valve Spring Kit - Dual Spring - 380 lb/in Spring Rate - 1.070 in Coil Bind - 1.300 in OD - Locks / Titanium Retainers / Viton Seals / Seats - GM GenV LT-Series - Kit