Overview Reviews Product Description Valve Spring - 1300 Series Drag Race - Dual Spring - 740 lb/in Spring Rate - 0.973 in Coil Bind - 1.300 in OD - Set of 16 Product Videos Custom Field Product Reviews Write a Review Write a Review × PAC 1.300 Dual Valve Springs Drag Race (16) Rating * Select Rating 1 star (worst) 2 stars 3 stars (average) 4 stars 5 stars (best) Name Email * Review Subject * Comments *