1.324 Dual Valve Springs - RPM Series (16) Valve Spring - RPM Series - Dual Spring - 500 lb/in Spring Rate - 1.000 in Coil Bind - 1.324 in OD - GM LS-Series - Set of 16

1.304 Dual Valve Springs - RPM Series (16) Valve Spring - RPM Series - Dual Spring - 392 lb/in Spring Rate - 1.000 in Coil Bind - 1.304 in OD - GM LS-Series - Set of 16

1.355 Single Valve Springs - RPM Series (16 Valve Spring - RPM Series - Single Spring - 380 lb/in Spring Rate - 1.180 in Coil Bind - 1.355 in OD - Small Block Chevy - Set of 16

1.290 Dual Valve Springs - RPM Series (16) Valve Spring - RPM Series - Dual Spring - 369 lb/in Spring Rate - 1.000 in Coil Bind - 1.290 in OD - GM LS-Series - Set of 16

1.304 Dual Valve Springs - RPM Series (16) Valve Spring - RPM Series - Dual Spring - 433 lb/in Spring Rate - 1.000 in Coil Bind - 1.304 in OD - GM LS-Series - Set of 16

1.625 Dual Valve Springs - (16) Valve Spring - 1300 Series Drag Race - Dual Spring - 629 lb/in Spring Rate - 1.100 in Coil Bind - 1.625 in OD - Set of 16